There is definitely some slop in the linear servo examples I have. A good percentage of it is backlash in the geartrain, but I think some of it is in the clearance between the pushrod wire and the output arm hole, and it might be possible to minimize or eliminate this.
I have yet to develop a feel for how much control load they can handle - I know what the specs are, but what I mean is in terms of "how much aircraft" that is from gut feel. For example, are they far too flimsy to even consider for a lightweight .010 model, with totally drag free sewn hinges and 1/8" sq pushrods? Or are they "just right" for a lightweight electric conversion of an 18" span rubber model? Or..?
There must be an informative thread on them somewhere, perhaps I should try that obvious step..