I was just looking at the wing on my 27% GP Edge 540 ARF. The top of the wing is flat - from tip - to - tip, but each wing half is tapered - thicker on the root end than at the tips. I don't know if you would call this dihedral or taper - well, I know it's taper, but I don't know if one would also call this dihedral. I guess it depends on how the manufacturer measures it - across the top or across the bottom.

As for an answer to your question about your Aeroworks Edge, I would refer to the instruction manual and see if it provides any info or measurements for dihedral. If not, maybe you could all their support dept. and ask. In the end though, considering the fact that there is probably only one way for you to glue the wings together, and if the center joint where the halves fit together is tight, I'd say you're probably fine. I guess there is the possibility that you may have installed the joiner upside-down, but unlikely because then the ends of the wings probably wouldn't have fit together correctly.