Oh right cheers chaps,im just using the rings that came with the wossner pistons if thats any help? nms bored the block to piston size for me and oli wrote down what piston ring gap i should do them to,but didnt know if that ment the top and bottom oil ring also.as it was about a year ago whdn i had the machining done.and where should the ring ends sit? Or is it different on each set up.would you suggest on buying some different/better rings?