Removing dihedral from wing
Lenn,
If this is the old design with the symmetrical wing, I have been through it. I took all the dihedral out and took out a rib bay from each side (reducing the span by about 6"). The results were fantastic! It was a great and willing flier and landings were much easier. The higher wing loading kept it from ballooning on approach.
I do think that a small amount of dihedral would be recommended. Not for flight characteristics so much as for appearance. With zero dihedral, my wing looked like it was sagging. A 1/4 to 1/2" on one wing tip should be fine. I also added a dihedral brace to mine. It was a lot of work, but the added strength was a great comfort. Like RC said, these designs can separate wing halves and the resulting flight capability of the aircraft is dismal. Oh it will fly ... like a lawn dart! You will have to remove the center sheeting behind the spars and cut a slot through the center rib sections so that you can insert the dihedral brace (3/32" A/C ply would be fine).
This was one of the most fun aircraft I have had. Good luck!
Bedford