Hi Brian
Moving the wing forward on a pattern model to keep the airplane stable is the wrong direction to go, and a big old time pattern Myth and the wrong correction to fix the problem. The airplane has to snap, to do this the c/g needs to be forward unless you fake it To get the cg at the right percentage of MAC with the wing forward is almost impossible to do and if you do what have you really accomplished? . Wing position is regulated by one thing , the ability to place the gear and make the CG right , nothing else (within reason). The reason for all the double fences ,and extensions is the placement of the cg no other reason. This "placement" is limited or controlled by the inc in the wing verses the thrust line set up. The Inc. setup is regulated by what the wing can tolerate. The smaller the area the less it can tolerate. and so on. where we want to run the cg verses where it tolerates the CG is where the problems show up.

I have adjusted a few of these models correctly and removed the need for these devises. the airframe is solid. its just a matter of adjustment.

Like I said earlier, the factory is only responsible for ball park settings, it`s up to us to get it perfect for our needs depending on what class we fly , most Add on`s are usually a shortcut and with a little bit of effort can be removed or reduced. Not all are for fixes though, some actually are good additions and enhancements.

my 2c

Bryan