I started on the K40 L2 mod, did some stock measurements, played some, found the parts to be fully interchangeable with the TN31. The bezel came off easy, so could pull off the reflector and see the emitter/star. This is what I saw:
One screw there, the other MIA, just epoxy where the screw head should be. Closer:
Next, removed the driver and star. Wires are 24 gauge (could be better), copper star looks identical to the TN31's, and driver of course just like the TN31:
Some driver close-ups:
Star (PCMCB) close ups:
Now here is a close-up of what I'm thinking is a broken off screw:
I ended up using a small drill bit, and drilling out the piece. I tried needle-nose first to grab onto it, and unscrew it, but it didn't budge and was too low to get a good grip.
The main threaded connection just above the mag ring was super tight. Tried the BOA strap wrench's with no luck - I thought it was said these aren't glued. However, I've come across every possibility with the TN31's - some glued on this thread, some glued on the tail threads, some glued on the bezel threads, some not... So after no progress, tried the heat gun and that did the trick. Here's the weapons:
Here's pics of the parts. Notice the main threads have greenish color stuff - not sure if this is "green" LockTite or what. I've seen blues and reds, but don't think I've seen green before.
Notice the ball bearing - this sits on a spring. Must be careful not to loose this. I'm thinking of cleaning up their gunk and using Nyogel instead. It seemed to work well on the TN31's, but not sure if it will make it smoother.
Major components:
Everything: