JRF,

As the planes get bigger the airfoils are more effective. Look at the average 1.60 size model and check the wing loading.

A 13-14 lb. model with 1000 sq. in. will fly as well or better than a 6-8 lb. model with 688 sq. in.

If you Goldberg comes in at 6-8 lb. the wing loading is 20- 26.8 oz/sq.ft. The world models plane is at the 8 lb. mark, I have one. It flys well, I hope the GP will fly even better.

Again,

Time will tell.