You are right... but I only run with Banshee for a few miles since the rebuilt... about 60 miles. Not more... And running very slow. This is the first time that I run hard for a 1/8 of mile.
I think I will only put new piston and domes and choose a base gasket. If it doesn't solve the problem, maybe next year I'd try to split the cases, once again...
I will call for Andy to figure out a new setup ( domes, jets, thickness of gasket ). I believe crank, bearings, etc... are in good condition ( I hope ).