UltraTac A1 emitter swap/tear down
The sum of the parts are actually pretty decent. It has a copper mcpcb, short brass pill, retaining rings, LED spacers, o-rings, etc. HOWEVER, it’s glued everywhere. The retaining ring has a slight indentation on it that I tried to use but it didn’t budge. I ended up using the smallest dremel drill bit I had (1/32”) and making two holes in the retaining ring and nearly breaking the best hardened stainless tweezers I have but I got it free. I found blue loctite on the retaining ring only. I was going to swap the tail spring as well but that ring is also glued so I decided not to.
TL;DR - dremel > blue loctite 
Parts:
Money shot:
Two holes in the ring are mine and the left hole in the driver ground ring is mine, the right hole was already there.
I swapped in a LH351D 4000K 90CRI and didn’t really lose much/if any output from the ugly XP-L HD that was there before.