We have published a paper describing the system and showing some measurements on Review of Scientific Instruments. Here I provide a copy of the publication on arxiv.
In the data folder there is the data for each figure (pdf and eps format) and a Python 3 analysis script which analyses the data and generates the figure (pdf). The same data can be found on Zenodo.
In the schematics folder there is the electronic schematics (pdf) of the circuit for generating and detecting the trigger pulses for the auto-synchronization.