Get you a glass table top, about 1/2 inch thick, (or a piece thereof, the one I have is about 1" thick) put it on flat table, put a little valve grinding compound on it and rub your end and center plates around on all that until the surfaces are polished smooth. You have just lapped them suckers. If a machine shop surfaces them you probably do not have any nitrided surface left. IMHO.
jofarr, soddy tn

----- Original Message ----- From: "James Brewer" <alpha@concordnc.com>

I would like to know if there is a do-it-yourself way to lap the housings