My personal opinion on servos... DLGs are very high performance precision flying machines, and very sensitive to control positions. They will fly just fine with cheap servos, just not efficiently, and that's the name of the game with DLG. The most critical servo is the elevator IMHO. It has to be 'precise' and have super accurate centering every time. Must be able to dial in your desired trim speed for the given conditions, and keep it there. Otherwise you will waste much precious energy flying too fast or slow, and moving the elevator stick too much trying to compensate for the servo inaccuracy. Must be able to deliver a very small up trim launch preset for quick vertical rotation at launch release, then quickly go back to exact neutral. Once you start flying DLG this will all start to make sense. You might be able to get away with cheaper servos on ailerons/rudder, but the above factors still apply to a lesser degree. It's nice to have a 'strong' servo on rudder to keep it straight during hard launch forces that are trying to bend it. Otherwise you will loose launch height due to extra tail wag. Flaperons sometimes need 1mm of offset to maximize efficiency in certain flight modes, and a cheap servo won't be able to deliver that reliably. You can start out with cheapos if you want, then change them out later when you decide its worth it. Most guys will recommend just skipping that step. The $80 investment for 4 good servos is well worth it. But if you can't do that then just get your TS2 flying with whatever you can. That's the most important!