Yes, I moved the wing tube forward, but that was more of a function of the CG of MAC on the new wing, not for balance. I also moved the stab forward slightly. I mounted servos in teh tail, but I think it's the last time I do it. It works, but after 500-600 flights, even the best servos develop slop and that's not a good thing for your elevator halves to be tracking slightly off. It can be easily remedied by simply refurbishing your elevator servos about every 400 or so flights, but I fly too much to make this practical. Most normal humans wouldn't even feel it or approach that many flights for quite some time. I have simply become very VERY anal and think I can feel every little thing (key word being THINK).

To address the relationship of the wing position (fore and aft) this most directly affects the longitudinal stability of the airplane. The relationship of the CG and AC of the wing and stab determines a great many things, most importantly the tracking vs manueverability of the plane in question. All designs are a balance, and pattern planes are the most balanced of all. If you tweak it to excel in one area, it WILL suffer in another. The schedules to some extent determine where that balance is most effective. If the schedules require a plane that tracks well at al cost, then you have a plane like a Prophecy. If it requires manueverability at all cost, you have a shorter coupled plane with a larger fuse. Ideally you want to find the perfect balance between the two and go with it.

This is an oversimplification, and believe me, if you have to move the wing forward 2" for balance purposes it won't give up TOO much manueverability, but at the same time if you want to keep your numbers close you have to down size the area of the stab, because again there is a direct relationship between area and the stuff earlier mentioned (I'm trying not to get too technical here).

The T2K had a short tail moment and made up for it with a larger stab. When I down sized the wing, I had to slightly downsize the stab as well. (And now it will snap and spin great).

So keep these things in mind if you want to change things without having to add lead and wonder why the plane is doing something great and then something else not so good.

-Mike