Re Cof G thing, 2 thoughts 1/3 of MAC (mean average chord) measured from the l/edge is a good place to start or look up the specs for the full size a/c to find same. Canards can be tricky. The addition of l/edge anti icing tape to the full size turned a nice a/c into a demon killing more than a few people around the world. The addition cased a change in airflow over the wing and the resultant turbulence when approaching the stall caused the a/c to fall out of the sky. Any model I have seen of this a/c exhibited the same charastics.