Thanks for the support, khodges. Finally found someone who agrees with me about the TH46. Actually, I've never even touched the idle setting it came with. I broke it in "by the book", on a bench, put it in my LT 40, and then after totalling my LT 40, I put it in a Lanier Comet (an awful plane), and it is running well. This little engine is rated at 1.75 HP, according to Tower Hobbies literature, and that's powerful for a low-cost 46!
Glen