Andy,

A heat gun is a great idea.

Oh boy, I can just see myself standing in the back yard on a 90+ degree day (I live in Florida) with a heat gun to warm up my engine. This time the neighbors will be shaking their heads for sure.

I recently picked up one of those Norvel RC .074's and it is a neat-looking little beast. Haven't run it yet so I can't go on about performance.

A while back I was thinking about getting either a Norvel or Thunder Tiger .07 but I like the compact muffler attachment method on the Norvel. The TT looks like it has a lot of extra metal to mount the muffler.