I'll give that area some close attention, as I now have the engine apart, again. The reed stop should be adjusted so it's about 1/8" off the backplate, right?

I put the Walbro on and things were progressing well with the tuning, then the vibrations loosened the backplate and wore clean through the backplate gasket, so testing is again on hold 'til I get a new gasket and some lockwashers.

This motor shakes a lot. Is it normal for these single cylinder gasssers to do this? It smooths out at a few rpm points, but really shakes, especially when it's 'four stroking'. I can see I'll really have to isolate the radio equipment in the plane it's going in. I balanced the prop, but I'll recheck it later.