I own a Bambi .009, and not only was it hard to start, it had to be modified somewhat before it could be run at all. Quality control was definitely not up to the requirements of an engine that small. Even now it is extremely finicky. I have about 10 minutes of bench time on it, just enogh to verify it really runs. I was driving a C*x 4x2.5 black prop. Probably getting 8 to 9K out of it. Just right for puttering around in a small stick and tissue FF plane.

It was produced originally in England by Albon, then by DC. As a curio it is marvelous, as a useable engine, it is really gutless and VERY expensive.[:'(]

For practical flying, I use a Tee Dee .010 with the C*x 4x2.5 prop mounted backwards. I may have an extra gasket under the head too. The engine is a bit touchy, but not too bad, and flies a 1.5 ounce model without tearing the wings off.