The only gripe I have with the Ace Edge stick is that its very hard to look around smoothing because the little stick is so slippery and short. So I took a suction cup I had from some other peripheral I don't use any more, dremeled out a little concave area that fits snugly on the stick and applied it with contact cement. Tried it out and now its 100 times easier and much smoother to move your head in the game, its like night and day and I can do it now while banking hard, where I could not do that before.
Now the suction cup grips my finger without a lot of pressure at all. If you get a chance do this mod. Its practically free.
Oh this is important, make sure to angle the suction cup towards you, that way it is almost facing you. Makes movement much easier. If you angle it so its facing up it actually makes it harder to sit your thumb in the cup. You can see in the pics the correct angle. Enjoy.
Here are a couple of pics.
