Well a 20x10 is going to put you high 6000 or right around 7000.

Its a powerful little motor but you dont put a 22x8 on a 40cc period.

Unless this plane comes in around 12or 13 pounds your 3D will be limited (if you intend to do any) if you doing basic acrobatic / IMAC stuff then you will be happy with performance even if you plane is around 15 pounds.

If you plane is going to be 16-18 pounds I would recommend moving up to atleast the 46 or the 60 if you want 3D performance.

Hope this helps...