ORIGINAL: wyo69cowboy
I've flown that plane^^with a DLE20 on it. Was a little heavy with that setup, but flew nice. A 1.20 4 stroke might be nice in it too, though I think I would go with the Sabre 56 over it.
At your altitude in beautiful Wyoming, I can see where Yak 54 might be a bit heavy with power options such as a DLE 20 or a 1.20 glow four stroke. Down here at sea level, the Saito 1.50 might even be considered too much, but that is what the throttle is for...
I am running an APC IMAC 17 X 6 Wide on mine. I hover right at 1/4th to 1/3rd throttle.