I'm running a pumped Saito 100 on 30% turning a ma 15-6 at 10,000 rpm on my Gp Extra 300s. Light and good power more than enough to hover. But I think the best choice would be a OS 120ax with a pitts muffler, u would have space shuttle blastout from a hover and only need 15% to do it... Cheap right here in canada and usa... I'm running a 120ax on my goldberg ultimate and i love this engine, very reliable and LOADS of power.

There are a few mods that really help this plane if yer interested.

I got mine down to 7.4lbs. I'm running hitec mini digitals all round. Rudder is pull-pull 5625. all on 6v