Very nice. I'm curious, what did you need the lines for? Aren't the ribs notched for the spars? Also, another option I've found and liked is to put the servo flat, as shown in the plans, but recess it somewhat. Then, make a cover plate that has a single hole in it for the spline to protrude up through. Now all that sticks out is the servo arm, with now big slot in the cover. However, this hinges on the wing being thick enough at that spot. Not always the case.
Very nice so far. Makes me anxious to start mine. What do you think your color scheme will be?