So just purchased a custom derby cover from Mountain machine for my '16 sgs. I can only find flat gaskets for the '16 under models with standard primary. That gasket is about 7" in diameter but the narrow primary derby covers are about 7-3/4" diameter so the gasket is too small and doesn't line up with the fastener holes. Anybody found a flat gasket that works with the narrow primary? I can't find one anywhere.
