David thanks for your advice I decided to put 1.50 " anhedral and hope its not to much, maybe i'll order a nice tuned pipe for this engine.

I already started building the plane, fuse is almost done, just like you mentioned about the rudder thickness I figured out to laminate with 1/16" sheeting to make this span the thickness of the rudder otherwise it would've be to thick.

In general fuse lenght looks ok. I will not go for foam wings, i decided to build balsa wings, more work but less weight IMO.

As soon I have some pictures I ll open the building thread.

thanks again.
Rafa