diff --git a/Plugins/Phlatboyz/PhlatMill.rb b/Plugins/Phlatboyz/PhlatMill.rb
index b01d471..1443ed7 100644
--- a/Plugins/Phlatboyz/PhlatMill.rb
+++ b/Plugins/Phlatboyz/PhlatMill.rb
@@ -280,16 +280,22 @@ def job_start(optim, extra=@extr)
         unit_cmd, @precision, @is_metric = ["G20", 4, false]
       end
 
-      stop_code = $phoptions.use_exact_path? ? " G61" : "" # G61 - Exact Path Mode
+      stop_code = $phoptions.use_exact_path? ? "G61" : "" # G61 - Exact Path Mode
+      ij_code = $phoptions.use_incremental_ij? ? "G91.1" : "" # G91.1 - set incremental IJ mode
       if (@gforce) # output the header on separate lines for Marlin 
          cncPrint("G90\n#{unit_cmd}\nG49\nG17\n"); # G90 - Absolute programming (type B and C systems)
          if (stop_code != "")
             cncPrint("#{stop_code}\n") 
          end
+         if (ij_code != "")
+            cncPrint("#{ij_code}\n") 
+         end
          cncPrint(format_feed(@speed_plung).strip)  #output an initial feed rate so system always has it defined
          cncPrint("\n")
       else
-         cncPrint("G90 #{unit_cmd} G49 G17#{stop_code}") # G90 - Absolute programming (type B and C systems)
+         cncPrint("G90 #{unit_cmd} G49 G17") # G90 - Absolute programming (type B and C systems)
+         cncPrint(" #{stop_code}")   if (stop_code != "")
+         cncPrint(" #{ij_code}")     if (ij_code != "")
          cncPrint(format_feed(@speed_plung))  #output an initial feed rate so system always has it defined
          cncPrint("\n")
       end   
diff --git a/Plugins/Phlatboyz/html/help.html b/Plugins/Phlatboyz/html/help.html
index bee5614..0bdd254 100644
--- a/Plugins/Phlatboyz/html/help.html
+++ b/Plugins/Phlatboyz/html/help.html
@@ -76,6 +76,7 @@
             <ul style="padding-left: 3px;">
             <li><a href="afterinstall.html" style="color: red">After install - things to do</a>
             <li><a href="sketchucamtoolbar.html"><b>The Toolbar</b></a>  very important!
+            <li><a href="machelp.html">Help for MAC users</a>
             </ul>
             <b>HOWTO:</b><br>
             <ul style="padding-left: 2px;">
@@ -135,6 +136,25 @@
 <tbody>
 <tr>
    <td width="90%">
+   
+   <div class="intro">
+      <h4>New in V1.4d (Jan 2017)</h4>
+      <dl>
+         <dd>
+         <dl>
+            <dt>Help updates
+               <dd>added <a href="machelp.html">MAC help section</a>
+            <dt>arcmoveij() is INCREMENTAL mode.
+               <dd>the 'incremental' form of IJ is used so make sure you set your controller to incremental mode by issuing G91.1
+               <dd>you can add this code to the G-code via the <a href="howto_options.html#a4">Options menu</a>
+               <dd>an option to output G91.1 as part of the Gcode header has been added to the Feature Options menu.
+            <dt>Solve failure to find <a href="howto_profileexchange.html">profile path</a> on Mac (for real this time)
+               <dd>Sketchup on MAC still has the old .openpanel bug that prevents the use of wildcards.  Mac platform is now detected and wildcards avoided.
+               <dd>Note that the file select dialog allows selection of a flder, but the profiles folder will always be used no matter what you select.
+         </dl>
+      </dl>
+   </div>      
+   
    <div class="intro">
       <h4>New in V1.4c (Dec 2016)</h4>
       <dl>
@@ -144,6 +164,7 @@ <h4>New in V1.4c (Dec 2016)</h4>
                <dd>added <a href="howto_3d.html">3D section</a>
             <dt>arcmoveij() now always used for arc outputs
                <dd>this improves arc accuracy and keeps Marlin happy
+               <dd>the 'incremental' form of IJ is used so make sure you set your controller to incremental mode by issuing G91.1
             <dt>Old files with arcs that have no center property will be rejected, they have to be recoded
                <dd>Early versions did not store the arc centers and they are needed for arcmoveij()
             <dt>Errant G0 move with no code removed from plungebore in Marlin mode.
diff --git a/Plugins/Phlatboyz/html/howto_options.html b/Plugins/Phlatboyz/html/howto_options.html
index d16b460..d794802 100644
--- a/Plugins/Phlatboyz/html/howto_options.html
+++ b/Plugins/Phlatboyz/html/howto_options.html
@@ -219,7 +219,15 @@ <h2><a id="a4">Feature Options</a></h2>
          very noticeable but anything over 200 starts to generate large radii so
          that the momentum of the machine can be maintained.<br>
          Turn this off for GRBL and related controllers.
-            
+   
+   <dt>Use_Incremental_IJ (G91.1)
+      <dd>Set this to true to put a G91.1 in th eG-code header.
+      <dd>G91.1 sets the G2/G3 arc commands to incremental mode.  Some controllers default to absolute mode but since our G-code uses incremental mode,
+      we have to change the controller mode to incremental mode by giving a G91.1 command.
+      <dd>Note that this is modal, your controller should remember it once you have set it so you probably do not need it in every G-code file.
+      <dd>You know you need this command if your controller displays very large circles instead of sort arc segments for curved sections of your drawing.
+      <dd>G-plot cannot display a file that contains this code. (yet)
+      
    <dt>Always_show_safearea
       <dd>Set this to true, if you want the safe area to always show, when parameters are saved.<br>
          Otherwise the safe area will only show, if it's size has been changed.
diff --git a/Plugins/Phlatboyz/html/images/options-feature.png b/Plugins/Phlatboyz/html/images/options-feature.png
index e656fe0..7260c76 100644
Binary files a/Plugins/Phlatboyz/html/images/options-feature.png and b/Plugins/Phlatboyz/html/images/options-feature.png differ
diff --git a/Plugins/Phlatboyz/html/machelp.html b/Plugins/Phlatboyz/html/machelp.html
new file mode 100644
index 0000000..706aae0
--- /dev/null
+++ b/Plugins/Phlatboyz/html/machelp.html
@@ -0,0 +1,39 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"    "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<head>
+<title>SketchUcam: HOWTO use Ramping</title>
+<link type="text/css" rel="stylesheet" href="style.css">
+
+</head>
+<body>
+
+
+<div class="shell">
+
+   <br>
+   <div class="intro-name">Phlatboyz SketchUcam(PhlatScripT)
+      <div>
+         <b>SketchUcam Version 1.4d</b><br>Jan 2017
+      </div>
+   </div>
+   <hr width="100%">
+   <div class="intro">
+      <span style="float: right;"><a href="help.html">Back to help index</a></span>
+      <h2>Help for MAC users</h2>
+
+      <h3>Special keys:</h3>
+      <p>Some Mac keyboards do not have the HOME and END keys (and ALT may not be labelled).</p>
+      <p>There are alternate combinations that simulate those keys:</p>
+      <ul>
+         <li>HOME = "FN-LEFT ARROW"
+         <li>END = "FN-RIGHT ARROW"
+         <li>ALT = OPTION
+      </ul>   
+      <p>Sometimes you may have to hit the FN-LEFT twice before the dialog comes up. </p>
+<p>Thanks to <a href="http://openbuilds.com">OpenBuilds</a> user <u>andycbrklyn</u> for help with this.</p>
+      <br clear=all>
+   </div>
+   <hr><br>
+</div>
+</body>
+</html>
\ No newline at end of file
diff --git a/Plugins/Phlatboyz/tools/HelpTool.rb b/Plugins/Phlatboyz/tools/HelpTool.rb
index f3124f9..e3ecf59 100644
--- a/Plugins/Phlatboyz/tools/HelpTool.rb
+++ b/Plugins/Phlatboyz/tools/HelpTool.rb
@@ -34,6 +34,7 @@ def select
             "  Use_compatible_dialogs = #{$phoptions.use_compatible_dialogs?}\n" +
             "  Use_vtab_speed_limit = #{$phoptions.use_vtab_speed_limit?}\n" +
             "  Use_exact_path = #{$phoptions.use_exact_path?}\n" +
+            "  Use_incremental_ij = #{$phoptions.use_incremental_ij?}\n" +
             "  Always_show_safearea = #{$phoptions.always_show_safearea?}\n" +
             "  Use_reduced_safe_height = #{$phoptions.use_reduced_safe_height?}\n" +
             "  Use_pocket_CW = #{$phoptions.use_pocket_cw?}\n" +
diff --git a/Plugins/Phlatboyz/tools/PhOptions.rb b/Plugins/Phlatboyz/tools/PhOptions.rb
index f2455fb..b812800 100644
--- a/Plugins/Phlatboyz/tools/PhOptions.rb
+++ b/Plugins/Phlatboyz/tools/PhOptions.rb
@@ -60,6 +60,7 @@ def initialize(phoptions)
       #features
          @use_vtab_speed_limit   =   (phoptions.use_vtab_speed_limit? ? '1' : '0')
          @use_exact_path         =   (phoptions.use_exact_path? ? '1' : '0')
+         @use_incremental_ij     =   (phoptions.use_incremental_ij? ? '1' : '0')
          @always_show_safearea   =   (phoptions.always_show_safearea? ? '1' : '0')
          @use_pocket_cw          =   (phoptions.use_pocket_cw? ? '1' : '0')
          @use_plunge_cw          =   (phoptions.use_plunge_cw? ? '1' : '0')
@@ -130,6 +131,7 @@ def initialize
          #features
          @use_vtab_speed_limit = Use_vtab_speed_limit
          @use_exact_path = Use_exact_path
+         @use_incremental_ij = false
          @always_show_safearea = Always_show_safearea
          @use_reduced_safe_height = Use_reduced_safe_height
          @use_pocket_cw = Use_pocket_CW
@@ -261,6 +263,11 @@ def initialize
             value = getvalue(optin['use_exact_path'])                if (optin.has_key?('use_exact_path'))
             @use_exact_path = value > 0 ? true :  false              if (value != -1)
 
+         # Use_incremental_ij = false
+            value = -1
+            value = getvalue(optin['use_incremental_ij'])                if (optin.has_key?('use_incremental_ij'))
+            @use_incremental_ij = value > 0 ? true :  false              if (value != -1)
+            
          # Always_show_safearea = true
             value = -1
             value = getvalue(optin['always_show_safearea'])                if (optin.has_key?('always_show_safearea'))
@@ -662,6 +669,14 @@ def use_exact_path=(newval)
          @use_exact_path = newval
       end
 
+      def use_incremental_ij?
+         @use_incremental_ij
+      end
+      def use_incremental_ij=(newval)
+         @use_incremental_ij = newval
+      end
+      
+      
       def always_show_safearea?
          @always_show_safearea
       end
@@ -1182,6 +1197,7 @@ def select
          # prompts
          prompts=[
             'Use_exact_path (G61) ',
+            'Use_Incremental_IJ (G91.1)',
             'Always_show_safearea ',
             'Use_pocket_CW ',
             'Use_plunge_CW ',
@@ -1200,6 +1216,7 @@ def select
             ];
          defaults=[
             @options.use_exact_path?.inspect(),
+            @options.use_incremental_ij?.inspect(),
             @options.always_show_safearea?.inspect(),
             @options.use_pocket_cw?.inspect(),
             @options.use_plunge_cw?.inspect(),
@@ -1225,6 +1242,7 @@ def select
             'true|false',
             'true|false',
             'true|false',
+            'true|false',
             '',
             'true|false',
             '',
@@ -1242,27 +1260,28 @@ def select
          end         # input is nil if user cancelled
          if (input)
             @options.use_exact_path          = (input[0] == 'true')
-            @options.always_show_safearea    = (input[1] == 'true')
-            @options.use_pocket_cw           = (input[2] == 'true')
-            @options.use_plunge_cw           = (input[3] == 'true')
-            @options.use_outfeed             = (input[4] == 'true')
-            @options.use_vtab_speed_limit    = (input[5] == 'true')
-            @options.profile_save_material_thickness         = (input[6] == 'true')
-            @options.use_home_height         = (input[7] == 'true')
-            @options.default_home_height     = input[8] # length
-
-            @options.use_end_position        = (input[9] == 'true')
+            @options.use_incremental_ij      = (input[1] == 'true')
+            @options.always_show_safearea    = (input[2] == 'true')
+            @options.use_pocket_cw           = (input[3] == 'true')
+            @options.use_plunge_cw           = (input[4] == 'true')
+            @options.use_outfeed             = (input[5] == 'true')
+            @options.use_vtab_speed_limit    = (input[6] == 'true')
+            @options.profile_save_material_thickness         = (input[7] == 'true')
+            @options.use_home_height         = (input[8] == 'true')
+            @options.default_home_height     = input[9] # length
+
+            @options.use_end_position        = (input[10] == 'true')
             if (@options.use_outfeed?)     # only one of them
                @options.use_end_position = false
             end
-            @options.end_x                   = input[10] #length
-            @options.end_y                   = input[11] #length
+            @options.end_x                   = input[11] #length
+            @options.end_y                   = input[12] #length
 
-            @options.use_fuzzy_pockets       = (input[12] == 'true')
+            @options.use_fuzzy_pockets       = (input[13] == 'true')
 
-            @options.ramp_angle              = input[13]  #float
-            @options.must_ramp               = (input[14] == 'true')
-            @options.gforce                  = (input[15] == 'true')
+            @options.ramp_angle              = input[14]  #float
+            @options.must_ramp               = (input[15] == 'true')
+            @options.gforce                  = (input[16] == 'true')
             #puts "saving must_ramp = #{@options.must_ramp?}"
             
             @options.save