what the hell is up with that dome.. it almost looks like the edges are exposed and that would cause hot spots...
NOSS domes NEVER look like that. dave would never ever ever send any crap out like that. you can call dave and send spec's pictures etc to him and he will cut whatever you want. i have had some custom stuff done with him in the past and i would never use anyone else to make domes for me ( except the ones i do here as experiments.) and they look beautiful compared to that crap up there) if that is passion's work thats some bulllllshit i think i would be demanding some payback from the re work you had to do.
the lower pic is what i would call a basic custom dome thats really popular basic shape right meow. a 9-8mm wide band. .050+ and kicking around 150psi should work fine. ( pump gas) you can fine tune the timing to work with that setup also. and make sure your jetting is very close. overly rich is just going to cause problems with the motor. i personally would never run ore that .048 squish on a cub. and only that much if your on alky and have a good tune in it. ( i like motors that stay together more than 2 trips out) there are standard "spec's for 2 strokes in general for squish clearance, band width and basic shape. i have seen a lot of really out there shapes and even myself have made a few what i would cal multiple squish band domes that work great with lesser octane fuels and alky too you can create engine pressure with timing or dome shape the best is whatever works for the fuel you have, the strength of the combustion chamber, how much fuel air you can jam in there. porting, fuel, cylinder design, etc etc all play a huge factor...