I just used the end cap from one of my Buzz pros on a Ver 1 LT, Ver 1.5 lt and the stainless LT that apollo sells. It worked on all
three. The spring was tight screwing it on, but it worked. What would be better, and what I'd like to do to replace the bottom cap on the ver 1, is to get the caps that are on the chrome and SS steel LT's. But I don't know where to get one. None of the vendors seem to have spare parts for any of the chinatubes.
EDIT: I hated the nubs on the ver 1 chinatube bottom caps. I cut the nubs off with toenail clippers. Much better.
EDIT2: I also put a bevel on the ver 1 top cap using a bench belt sander with 100 grit. That gave it a much cleaner look. (much like the ver 1.5 top cap, but retaining the
juice well)