RE: Do you suggest the OS FL-70 4str.?
Jimmy:
One of my very few OS engines in service is in a Modeltech Magic, it is a 46 FX, I couldn't ask for any better performance in the plane. The Magic Extra is similar enough that I think its performance should be identical.
Another consideration is that if you are just learning 3D you are going to have some unplanned landings. Not only is the AX less expensive than the FL to put on the plane at the starts, it's cheaper when you have to buy another.
Bill.