@shoofle could it be threaded?
@scanlime i got it to work! the parts i was looking at were not threaded, but it turns out one of them came apart into two parts, which threaded together. and the glass had to be clamped between them!
i had to look at the other lens i had to figure out the right orientation, though. I think it's back together and working~!
@shoofle sweet!