Mike, you posted for info on an engine for your 4*Star60 and was leaning toward a ST 90. Did you use a ST90 and how does it fly? Did you need to add any lead to balance it?
Actually, I just got the FS 60 ARF 2 days ago for Christmas. However, I DO still have both the SuperTiger 90 (Italian) and the Enya 90 4C. After running both of them, I can definately conclude that both are great engines, but since this is my second plane, and I don't want it to be too hot, I decided to put the Enya 90 4 stroke in. Once I get bored.... I might have to dust off that ST 90
If you have a ST 90, I would definately say go for it. Form the advice on RCU, the ST 90 is a perfect match. Apparently the FS 60 is a very tail heavy plane, so it likes a heavy engine up front. If you don't already have the engine, go for the ST 90... the 60 and 75 SuperTigres are all the same size/weight (and almost same price), so go for the best (just make sure to use your throttle).
Best of luck,