I just bought a 4 mill. long rod +5 crank. And I want to have the best setup for 300 ft drag. The spacer plate cause me some problem. With my kit I received the upper spacer plate and some builder where I come from (Quebec) said that they always use the under cylinder plate. I have t5, 33 pwk , rms stator, racelogic stage 3 and boost port on transfer. What is the better option for me. the upper plate or the under? Most of you said that the cut dome was the best way to go or upper plate . thanks for reply !