the shaft aint a bad barrel.but i find ego owners dont match paint to barrel.so as long as you have a good match.dont really matter which.lemon has used a .689 most of the year.and had better results.than with the .693 shaft.so get one standard ultra lite and your shaft.
I've found the standard 06 barrel to be just fine as well, whacked a stiffi on a couple of times but it wasn't as good, though there is a high chance that it was a little too small for the paint.