I have two choices...OS 46fx and OS70 4 stroke. Which engine would be better for this plane. The 46 fx weighs 13.2 oz. and 70fs weighs 20.10 oz. Will the difference of approx 7oz. be a lot? I plan to use an APC 14x4 W with the 70 or an APC 12.25x3.75 with the 46fx.

I want to 3d with this plane. Any advice?

Anurag