I had the DP Extra first I flew it with a OS 160FX. It flew alright but the 160 winds up so slow that 3D was out. I then tried a YS 140DZ, with it's instant response the plane was great. If I did it again I would most likely use a Moki 2.1. 50 cc gas would be fine but my wife hates the smell. A small concession for all her support.