A little hard to put words to. Perhaps the best is that it was tempermental. You could be correct that heat was getting to the carb as it would suddenly die when otherwise running full power with a correct mixture. A mica mounting gasket on the carb base might have been prudent.

Full power would fluxuate by 500 rpms. It also took a full 2 sec servo slow down to avoid spool up stumble. I've never needed more than .7 with Saito conversions. When spooling up, it would reach a full power plateau of 7500 rpms on an APC 12x6 and then after perhaps 4-5 seconds then creep up to 8000 and then migrate between.

On nitro it goes to 9500 and is rock steady.

Honestly, I didn't do it full effort because of it size... concerned it didn't have the power needed when running gas. On gas it is a full 1500 - 2000 rpm below nitro. And the designated plane probably needed a .65 conversion but the .52 is what was available.

I hate to regress back to the days of stuck valves and messy clean up and should it have excess power than needed for the plane... I might revisit running it on gas. The plane is a 48" RCM Basic Pipe that calls for a .40 2 stroke.