I'm with ya, Rich, I can't stand the inertia feature either, and I have no idea where they got the part about most people wanting it. Almost all of the guys that I know and have talked to have said they don't want inertia and even if they do want it they definitely want the option of turning it off. For close-quarters driving like you find in an IR battle an inertia feature is a definite drawback.

It might be because most of my gear boxes are older, but I've never had any trouble with the diameter of the TG shafts and the HL sprockets, it's the flat. I just take a diamond file and file down the flat a little bit and then the sprocket fits right on. That may have changed since the last time I did it.