What glow plug are you running? We are running a four stroke plug in the lower compression engines, but a higher compression engine might like a regular two stroke plug. A cooler plug, if it will stay lit with the gas/glow mix, would retard the timing as well.

Just as an off the wall guess, I was thinking you should raise the cylinder around .045". Once again, that goes against normal engine optimization theory in the area of the squish/quench band, but it's an easy experiment to try and once again, the squish area shouldn't be as critical in these small bore engines.

If you can't get it to work after you run out of experiments, you could always run FAI mix; straight methanol and oil. It should run well at those compression ratios.

AV8TOR