This thread is starting to overlap with the other Hybrid Edge thread:

http://www.rcuniverse.com/forum/m_6682446/tm.htm

See my answers there regarding the wing jigs. But yes you can inset the jigs slightly if you want to to prevent gluing to it. That would be a builder's preference. Again it is important to keep the ribs parallel to the board as measured along the center line of the ribs. Outsider, the ribs are all laser cut and the profiles are designed for a specific reason. Modifying the ribs is not necessary. Build per the plans and follow the instructions and you will have no problems.