Thanks Andrew. I need to re-read your post I guess ;-)

Actually, your link points to a good question. Which side to measure on.

The instructions show them measuring from the left-hand side (with left wing and root rib on the left; i.e. on the root rib side of each rib). On my G1, this will mean the top of the root rib will tilt to the left while on the board (up-side down); I think this makes sense since this is the bottom of the wing and having the bottom longer than the top will allow you to move the tips up to set the dihedral. (Looking at your photo on the first page of your build, it looks like you started with right wing and had R-10 on the left but had G1 on the tip rib side...maybe that is it since G1 does need to be on the correct side; whatever that is; I will go with the root rib side).

I did as you said and used a square to set the R-3 to R-10 on the first spar (using G1 did not change the setting since there is some give on the top of the ribs with only one spar in). I will decide what to do when I set the second spar in and see what looks right. Either way, I agree the key is the root rib.