Hey, welcome, I'm working on some updated drawings because I would like to build one soon.  OSE is planning on building one based on most recent designs in January, from what I understand.  Please see my log for some notes on recent work.  In my log I've also posted some updated 2d drawings pdf files etc.  The drawings I've attached should answer a few questions.  My understanding is that they've moved away from mounted sensors and replaced them with a hydraulic pressure switch.  Also this is a page for some of the up to date work where you might be able to find out more even though I haven't updated this page with the most recent drawings from my log.