My I suggest finding an aerobatic flight trimming guide. I have seen a few different ones on the www, but I cannot remember specifically where. They will tell you a series of basic flight tests that allow you to figure what the airplane is doing, why it is unbalanced, and how to fix it. Sometimes the plane needs adjusting, sometimes a radio mix is needed. Unless you don't need them, I would not rip off the landing gear until all else fails. I have not flown the type of plane you have, so I don't really know. All of a sudden the website r/c airplane (or aircraft) proving ground comes to mind. Part of the problem may be the location of pushrod linkage connections in the servo and control horn which make for a overly sensitive plane. Select the holes that match full servo throw to full throw desired from the control surfaces. If you have the end points of the transmitter too low you lose control resolution (feel/sensitivity). There is a magazine out called 3-D Flyer (.com) where Chip Hyde is doing a series of articles explaining all of this. I just ordered all the back issues because they have such great information.