Wow, O-like is great for their selection of glass pieces and such to mess with it looks like. not bad, not bad. i wonder if those caps would fit my blue ice focus adapter. it is threaded. :thinking:
About the back reflection, that's what I thought too for the longest time. Apparently not really an issue though. I'll see if i can find the thread where it was brought up.
Agreed on the star field mini projectors... they can be had for <$25, set it, and forget it... the individual beams are under 5mW, although I still aim mine at the ceiling or corners of rooms.