well, just as i was going to button up the top end with a new rings kit, turns out seller sent me a 58mm kit and not a 57mm as i need! Worse, these Akunar people in Thailand who made wonderful pistons went out of business...
so then, if anyone can think of a source for 57mm thin racing rings, ill be glad to hear
it's a three rings piston, top two ones are 0.8mm, the three piece oil ring is 1.4mm
thin, i know, these were performance pistons.