I hear ya Artisan...I flew a lot of controlline in the 70's...

Sometimes it's just fun to run an engine on the stand. A friend has a Pegasus, (O.S. opposed 4 cyl.) and that was fun to get set up and test run

I ran an O.S. 1.08 not long ago, and during the first (6 oz. ) tank running excessively rich, I measured a cyl. head temp of about 110 degrees. I figured that was too cold...so I leaned it to get the cyl. head temp up to about 160 or so, and to be able to remove the plug battery. I'm wondering now though, if it really is possable to "glaze" a cyl. at such a low temp? (personally, I don't think so )
Maybe if there was a tremendous ammount of fuel passed through it?

One thing not yet mentioned is...do you really need to heat treat, heat cycle the ring to "temper" it as one of our local "experts" says?