I've also considered them for multi-cylinder use... Then I thought about how much breath it takes to run just one cylinder, turned blue in my face at that thought, and dismissed multiple cylinders ;D - I actually have to build more rockers for some of my friends at a later stage, but will stick to single cylinders. Funny thing about these engines though - If I show off my three completed engines (rocker, tiny & fancy), people always makes a bee-line for the rocker first....
A small one will be nice though - haven't thought too much of scaling it down. Would be very fiddly to put together :big:
Regards, Arnold