Does anybody have an unbiased opinion on the Extra 300 by I.A.D Model designs?

I'm still building mine and have only one concern.

My wing joiner seems a bit flexible, a little concerned that it will flex or break under some mild aerobatics. It has a foam wing and it seems the wing tube in the wings are compressing the foam. When I join the wing then bolt it to the plane, have it inverted , then lean on the wings the centre gap opens about 2mm. The kind of load I think would be in a mild climb. I'm sure it would snap doing square loops or something similar. In my mind there should be no flex or movement at the join. What do think?
I've made the control surfaces slightly larger for 3D but do you think of the 3D capability??


Kevin