Ed,

There are quite a few threads here on RCU related to Briggs 34cc conversion. The threads also give a lot of guidance on the right type of model for a four-stroke petrol egine. My engine and some of the others being converted came from the seller identified by you.

The following threads are good sarting points for information.

http://www.rcuniverse.com/forum/m_4658598/tm.htm

http://www.rcuniverse.com/forum/m_35...tm.htm#3539242

I have not had he tme to do anythng with my conversion yet but many others have.

You should also check out Prop Nut's videos of his 1/4 scale Fokker DVII and DVIII flying on this engine.

http://media.putfile.com/Fokker-DVII-Sunny-Day

http://media.putfile.com/Fokker-DVII...-Stroke-Gasser

For me the sound is absolutely awsome for a large WW1 aeroplane. I can just imagine a 100 inch or so wingspan Etriche Taube flying on one of these engines on a warm sunny eveneing!

Hope this helps.

Maninder.