so, I'm cruising the aisles in Home Depot (or was it Lowes?) and I stopped and saw a PVC Shower drain 3 inch with a large threaded mount.

I cut the end right up to the edge of the thread.

wrapped about 1/16th of an inch of electrical tape around the lens (to snug into the opening) and keep it centered.

Traced the exterior edge of 6 point ring onto a piece of mdf, and cut it out carefully with a jig saw.

the 6 point locking ring is held in by friction/pressure at the moment, but it allows some forward backward movement. I want to be able to center the focus range before locking it in with a angled screw.

I'm still testing for any FOV interference, but because the thread is only about 1 inch deep and 4 inches wide, it shouldn't be a big deal.

Yes, I know this doesn't have pictures, but I like to test stuff first before wasting time videodocumenting it.

I did this on my PJ as well. I dremmeled out the points on the threaded ring PCV so it would fit snug into the hole in the MDF. Mounted the triplet on the interior threaded point. No blockage of the projected light. Only downside is that you really have to crank the lens to get it to move a small amount.

does it look like this? I found this at Menards a couple months back. it is the focus ring I use in the enclosures I have for sale.

I don't know how all of you are using these I had nothing but bad luck with my focus mech made with threaded PVC pipe. The threading is tapered in such a way that one section of the screen is always out of focus.

I went with a sliding type focus mech made from a PVC pipe conensor and it has worked extremely well so far and I can achieve even focus with it.

You can check my plog in my signature to see it. Best part is the rear is so wide there is no chance of FOV being blocked

you can use the threaded pvc pipe, but you can't use the 'threads' to move it in/out to focus, better to just slide it in/out of the hole in the box

so the threads are too loose to keep the len aligned when rotating?

are you saying that an inch of movement isn't enough to accurately focus the image if you have the center point aligned?

what sort of issues have you found?

I had FOV problems when I tried something similar.

I used a 3"PVC toilet flange which was smooth on the inside, the triplet itself was mounted to a threaded PVC adaptor, and using my drimmel I was able to notch out the inside of the toilet flange so that I could insert a 3" EMT (Electrical Matalic Tubing) locknut inside of the toilet flange and by the threads of the locknut being metal the threads of the PVC adaptor that holds the triplet is aple to screw all the way in with no problem.

I will post some pics as soon as I find them

Does anyone know if there are drains the right size for the Pro triplet?
I tried to do a search, but of course "pro" is too short for the search thingy.