I found the ring replacement thread interesting. Are you guys using a hone on the bore when replacing the ring? What type of hone are you buying, is it one for auto brake cylinders? Perhaps a smaller hone for the 40 size engines and a larger one for the 90 size?

Also, is anyone using diamond paste when honing the bore? I saw this trick in RC Report magazine a while back..... said the cylinders were very hard material and difficult to get a good cross hatch hone job without the paste.

Thanks,

Ernie