Tom, RMH is pretty much the master at setups as he has built airplanes for the best. Not much to add except: Servos, servos servos LOL. I'm not sure what size your 260 is but outfit it with premium servos. No matter how well setup the airplane is, it will be of no use if you experience servo blowback or poor centering. A good example of this is my current project. A 50cc Laser 200. The servos planned at this point are Hitec 7955's. Power wise these are overkill but it's the precision I am after. There are even better options out there for precision but I have found the Hitecs a great value oveall. For aerobatics I like a servo no slower then .15 sec. 60 degree. Once you have quality servos, good linkages and surfaces that move freely you are about 1/4 of the way there. The rest is all setup. Like RMH states you will want to keep the ATV and DR settings high and set throw mechanically. The caviat here is that I like to run a servo arm no shorter then 1". Any shorter and you effectively reduce the speed in which the surface moves. Some will disagree with this but it is what has worked well for me. Rule of thumb is I usually set up with 1.25" servo arms and 1.5 to 1.75" control horns. This gives enough throw for light 3D work but allows you to do an IMAC setup without killing too much resolution. For airplane setup, step one is to measure the airplane and make sure it is strait. If not make corrections. We can go for pages about the actual setup but the best thing to do is get the airplane flying, set the CG where you want it and then ask questions.