This is way before my time, but in the 7/75 MAN is an article for the Comptaur by a Don Botteron. It is an aerodynamically modified Top Flite Taurus intended to better suit the flying of that time. The biggest changes were a decrease in dihedral, straight TE and a redesigned fin/rudder. I bring it up because of the mods that I'm seeing done to the Primus kits here on RCU. I just thought it might add to the discussion.