What engine for U Can Do 3D?
Well, you need throttle control no matter what engine you use...It's only overpowered if you use all the power there!
The YS .91 is a great engine, but it is heavy. It's 6 or 8 ounces heavier than the Saito 1.00 which is a significant difference. You don't need the extra power and definitely don't need the extra weight.