Hmm...today I was mounting the engine, hoping it would be the last time, with the throttle linkage, tank and all tubing in place, when I realized there is still one more problem to solve: Access to the needle valve. I had been thinking this would be a matter of an easy-peasy extension (and a slot in the cowl) but just now noticed that the the needle valve is directly in line with the ring exhaust. In other words, the ring blocks a direct line to the needle valve.

This is going to take some thinking. Is there such a think as a "remote needle valve?"

I wonder if I could use flexible wire cable as the extension.