In defense of BME..I am not a BME owner...I HAVE been working on 2 strokes for MANY years..
The only engine I have ever seized was a 289 racing twin, running on a test stand.We had switched from FAI fuel to 5% nitro and were trying for the last 50 rpm.We were running wide open at about 8000 rpm, slowly tweaking the high speed needle...It started to slow down, but we were not fast enough on the needle to get it rich again..Broke the cylinder base clean off and also destroyed the piston..The engine had been previously run with no problem....The piston clearance on the engine is less than .002...It takes very little lean time with an engine this tight to do the damage...I don't know what the clearance is on the Keith's cylinders, but if it's close and the engine gets lean at all it WILL stick..The previous flights show that it must have been OK..I haven't heard of any other 110s with this problem, but with the fins turned down so far it could happen....
An engine, ANY engine, should be run just a little rich just in case..
I can sympathize with Keith, I get calls all the time and in a 1 person shop it sometimes gets old....