well my dome is 22cc bore 67.5mm squish 1.5mm stroke is standard my uccr worked out to be 12.71;1 and i been running av gas.my cranking psi on gauge is 150psi which i think is low due to exhaust port being large,as you know im machining head to take the start of the squish band/dome out to the 67.5mm.what im concerned about is that i will lower my gauge psi more because i will be taking a little bit more material out of the dome to achieve this,so my thinking was to keep squish abit tighter to maintain a higher gauge psi,or maybe am i placing to much importance on the gauge psi.cheers paul