Ah Sunfish,
With the utmost respect, I do believe the only purpose of aircraft flight control stops, be they fixed or adjustable, are designed for flight control rigging as per the manufacturers specs in their respective Aircraft Maintenance Manuals e.g. aileron 20 deg up/down from the neutral. Nothing to do with flight control jamming prevention "at the extremes" whatsoever. If you are an Aircraft Maintenance Engineer (LAME or AME) please feel free to correct me if I am wrong.
Rgds McHale.