Its been awhile since I posted, I wanted to drive 12,000 miles + before doing the drain.
All seems to be holding up after 24 months+. The 2 elbow fittings are still holding up fine. I think if you make too much of a modification to the sidewalls of the fittings is when they weaken the sidewalls, and eventually they crack and give out. The elbows I have on are unmodified. It's very difficult to fit on if not modified, but doable.
For those of you who have gotten the kit from me, I hope it's holding up well for you and please share your accumulations.