I'm gonna call Jon at "collectors" tomorrow & see if he can get 14 (.001")'s cuz if I can slip em in there plus reduce the head feeds & get my pressure up OK I will be very happy (16 would be perfect but maybe 14 will suffice to reduce the psi). If not I'll have no choice but to tear it down but at least the HG issue is resolved. I would like to get a set of those (.008") just in case or for another block that will likely need em oversized. Nacho I will holler when I hear from him. EDIT I did the math on the area of a circle going from .904" to .905" & it is a gain of .0227 sq inches of area, which at first glance don't seem like much.