RE: Engine suggestions for a Four Star 60?
Excellent choice for a second plane!
I once put one together with a Saito 100 and it was a great combo. Certainly no lack of power and very maneuverable, but also very forgiving. The downside is that you have to go through the Saito break-in and setup learning curve. For a second plane I would recommend a Saito only if you have plenty of experienced help.