Matt @ Tyga (or was it Paul?) told me he used to run D pistons in larger cylinders for extra clearance. Since I had a piston nip up on me last year I decided to do that even though it was more my fault than the bike's. However, I forgot to ask what rings to use - do I use the ones for the D piston or the appropriate cylinder, or doesn't it matter? Thinking about which would work better makes my head hurt. I'm putting the engine together now and have the D rings on the D piston so please help!

Thanks for any advice.
Craig