SF, it has been my contention for quite a few years that when you see a rant as above that (1) they can't admit that they can't tune an engine or (2) they're just blowin smoke and don't even have the engine in question. There was a similar situation with a Saito 2.20 where the guy claimed that he took the 2.20 back, got an OS 1.60, put it on the plane and test flew it in a matter of 15 minutes. I can't see a Hobby Shop making that exchange nor the timeline being doable.