I flew three more flights yesterday and the SuperTigre 51 is still getting stronger. I do have the fuel filter on it now and had no trouble with mixture at all. No more JUNK in the carb. It's also getting better about staying more consistent through a tank. Probably because it is getting more broken in. Starting was easy yesterday as well, I flipped it 3 times while choking it after fuel was in the line at the carb. I turned on the ign. switch and it started on the second flip. I start it bare handed, flipping it in the direction of normal rotation, and it hasn't smacked me yet. When it first fires it doesn't have that hard pop like it did as a glow so I don't think it will get my fingers. It starts much like my EI G26. I ran it full throttle for about 6 or 7 mins to see how it would react to the abuse. It still seems to be in perfect shape so no teardown yet. I am thinking I will just run it until I get a feeling something isn't right. I pulled the plug yesterday after flying and it looks good with a dark tan center porcelain. The piston is still like new aluminum on top, no discoloration at all. The Sportster is many years old so I am thinking of giving the SuperTigre a Christmas present and put it on a brand new Super Sportster ARF. [8D][8D]