Hi there. I saw your post on the roller with the aga not screwing on flush. What I did was take the center post completely out of the aga and used a grinding wheel on my dremel and held the dremel between my legs to make it stationary then took the center pin of the aga and turned it on the grinder and made the diameter of the pin smaller. Now I can screw it all the way flush on my roller and on other mods. Also now I don't have to worry about the center pin touching the negative portion and shorting.