Well the resistor fixes I presented in the past weren't actually completely functional; because they only applied after a "center point" was established via startup voltage. So after a restart they become useless, even though things appear to be working fine.
I wouldn't trust RDC just based off of what I've heard and my personal experiences with him, and I haven't personally tested his boards either. If they work that's great.
Deadzone issues were only noticeable when the stick was standing perfectly still. Otherwise it works fine for normal range and use, atleast in my experience. And considering how little the stick is actually supposed to stay still, it's virtually unnoticeable when playing a game.