Seen two fly and both were nice. One had a ZDZ48 I think and it was definately sufficient, the other had a ST G3250, that was under powered. I think it will be brilliant with you 3W50. However, you will need to hack at the firewall to get your carb in. She looks great in flight, I would love one but am thinking more of something like the Sky Shark RC one. It has a much lighter wing loading but will probably not be good for a gasser of 50 cc.