thanks for that k , rings on this one are the same pissy thin things , they were seized in , i got them out , filed the really ugly bits off the piston , got a set of 72mm wiesco rings off a dead bully piston , used the angle grinder on them till they fitted the groves, ground the ends till they would fit in the bore ,gave it a quick hone , slammed it together , must have 200psi , stuck the bare engine on a rag on the concrete , gave it a shot in the intake , 6 kicks and it,s belching out smoke and noise (that,s full noise) , no 2000 dollar engine rebuilds here !