Its been 12+ years since I set my Euro up (best, longest lasting jet I've ever had BTW), but I believe that, like Dave, I only have trim on my elevons. My canards are lined up with the panel line at neutral elevator, which looks like its about 0 degrees, but I would say that whatever canard angle you start out with, you adjust the neutral so that you don't wind up with a bunch of elevon trim that is in opposition to the canards.
Bob