Scott

The ZDZ-80 single is a real powerhouse. You will have to be careful with servo placement as this engine is very light and the CG could be a problem. The Mac 85 is a good choice, a bit heavy, but runs very well and smooth. As far as I am aware there is no longer any support here in the US for the Mac. I have recently bought a 125 Mac and was very lucky to even get mufflers for it.

The GT-80 is also a good choice, similar to the Mac for power and smoothness. The Zenoah's are easy to get, well supported and have a great reputation. I prefer the GT-80, it is priced right and lasts a lot longer than many other types. What I do with mine is to loose the spring starter, change the ignition to a CH unit and run either lightweight mufflers or canisters. These engines keep running and running well. Even stock, these engines are great performers, user friendly and easy to install. Stock they include everything except a prop and spinner.

I am flying my GP330L with one of the GT-80's, without spring starter and CH ignition unit. The mufflers have been gutted and the seams rewelded. Awesome combo spinning a Bambula 26x8.

The Fuji has very mixed results judging from the comments on this forum.

I would not go with a single though, the twins are so much smoother.

Safe Flying!