Thanks for the reply Av8tor.

What's four-mix? I am guessing four stroke engine run on fuel mixed with oil like a two stroke. sounds ideal!

I saw your thread on the Stihl engines. Looks promising.

I'm particularly loving the Bridi Big Bee video - fantastic engine sound! Although i believe it's 65cc - a little big and heavy fro my prospective use in a Giant Mud Duck.

We get Stihl tools over here in the UK so I'll keep an eye open for something - maybe one of the 32cc will be ok? Otherwise I'll just have to build a bigger model... :-)

Btw, what's the model in your profile pic - a Hannibal?