Hey, first post on here after finding the whole project a few days ago. I fly racing quad-copters through fpv, (first person view) so live view from a camera on the quad to fpv goggles. so not too much of a difference but i thought i might tell you about all the hardware we use, namely micro fpv cameras, super low latency 3-20ms with wires so you can fit them anywhere, smallish size at 19x19mm which is pretty tiny for a high quality feed like these. anyway, for optics we mostly use goggles which have 2 sets of lenses but there are some cheap ones we can take apart (although please don't use these as goggles, they are cheap for a reason) namely eachine ev100s, they have 2 sets of screens but the flex goes to the main board which is vaguely face shaped so you can diy something for that. also what may be fun is adding a 5.8ghz video receiver to a tap, so you can pickup feeds from around the place and as its analog anyone can tune it, truly open source! Thanks for reading and I hope to make my own tap soon after I've been thinking about it for the last idk 5 years? never knew there were others! but just ask if this needs any clarification or anyone is interested in the racing part. Edit: I found a cheap beam splitter on banggood: https://www.banggood.com/1Pcs-30301_1mm-50R50T-Optical-Beam-Splitter-Plate-Optical-Laser-Lens-p-1379199.html?rmmds=search&cur_warehouse=CN#jsReviewsWrap banggood are usually quite good and ive ordered much more expensive stuff from them so this should be fine. I just thought id put this here as I saw you guys had an issue with expensive beam splitters, (might have been prisms but idk enough about this yet to know the difference).