oo good find, mark. that lead me to some 55cc DLE engines which are close to what i need, i could consider buying those off-the-shelf instead and their pistons, save me making them. do you - or anyone else for that matter - happen to know of any other model RC engines, preferably 2-stroke with glow-plugs, in the 30 to 55 cc range, that use rings? using ready-machined matching parts like these would make the remainder of the engine a much easier proposition that i would be much more comfortable with.

/peace.

l.