Hi Dirk!
At least with the Simkits stuff (we have the instruments on our aviation club sim project) - I noticed a difference: They recommend HiTec servos, and indeed: I got Futaba ones, and they do not have that big of an angle for the travel. They simply do not rotate to the end with the same pulse as Hitecs do. There is still some movement available (if you turn by hand) before the end limiter, but the servo itself will not turn, it just vibrates.
So it looks that different servos have different characteristics for pulse response I think. You should probably try with a Hitec and Futaba as a testing pair, those really show the difference - at least here.
I originally had trouble calibrating some simkits instruments that depend on the full travel of the servo, and I had to swap in some Hitec servos from my RC plane in order to make them work. The Futabas work great on the plane anyway, so I was lucky to have those around. Hitecs worked OK eventually. So that is a tip for you others out there until a solution is found: try if Hitec servos respond better to FSBUS. They should be slightly cheaper too I think, otherwise the basic servos should be of equal quality anyway, and in RC use there is no difference since you can adjust the linkages to control surfaces..
Best,
Tuomas
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