[G.M.]

Keystone there is more involved in pumping water then just the number of impellers. I designed the impellers for Skip and made and tested maybe 10 or 15 of both the early 32 to 36 and the later 37 to 53 types of impellers. The ones that I thought would work and looked good didn't change the flow enough to make any cooling improvements. The ones he is using almost double the flow. Every pump he does is tested on a machine that measures the flow and checked for leaks. Consistant tolerances and quality control plus testing every unit of any product is the key for quality. G.M.