I have tried several different brand of servos and although some were better than others, all have have poor resolution when setup with large control horns for 3D rates. I've tried Airtronics, GWS (very bad servos!) and Hitec. Although with high rates set mechanically at around 30° on max throw things aren't that bad but if I go to 45° or more then each 'step' of the servo is a very noticable amount - as a gues I'd say at least a degree or two or a millimeter at the tip of the elevator (Sig Cap 231ex).

Is this a common problem? Are some servos better than others? I have noticed my 5645 digital on the rudder even with it's large throws isn't as bad but still noticable. It's not killing me since I can barley fly this thing now but eventually I'd like to start trying 3d (harriers, elevators for starters) and I'm not sure that the 30° I have is enough and I am not daring enough to try and fly it with the 3D setup since the elevator is very sensitive and I'm sure that 1mm of travel is quite a bit of elevator to have as a minimum resolution. Anyhow, how do you guys deal with this issue? $150 servos?