ORIGINAL: Hobbsy
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.
Hobbsy, I hate to admit it, but you are probably 100% right.
Youngun, if you really are having such problems, take Hobby up on his VERY generous offer.
If you don't feel comfortable sending your engine to Hobbsy, send it to Horizon and let them take a look at it. I'm POSITVE you will be happy with your engine afterwards. I had one Saito that I sent back to Horizon. It was replaced, and I've been happy ever after with it.