Chainsaw Repair

Well, I'm messing around with an experiment turning a HVA 261 into a 262XP. I do not want to cut a new band and the 262XP does not provide enough clearance to run without a base gasket. Nominal squish with the gasket is 0.03275 base gasket is 0.345. If I were to run a 0.5mm gasket I might get away with it. The experiment is to try to use a 365SP piston, which is 1.5mm 0.060 taller than the stock 262XP piston. So I'm trying to figure out if there is a way to get close to 0.020 or even a little less using standard HVA or even AM gaskets without cutting a new squish band. In the past I would cut a custom gasket from 110 annealed precision copper shim stock but don't want to do that for a single experiment.

After all that krap, if any of you guys have any thoughts let me know.