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.
That is one of their purposes. The others include; preventing interference between control surfaces at the limits of travel, preventing the control surface from interfering with secondary structure (eg; fairings), preventing the control circuit from moving outside design mechanical limits (eg; linkages going oversquare or interfering with other structure). These are all potential causes of jamming.
The applicable FAA words for the strength of the stops are something like "all loads obtainable by a pilot in normal operation" the FAA goes on to specify what those are and they are pretty hefty..
Which adds up to my observation that stops are properly designed to cope with frightened (and strong) student Bloggs or in the case of the Evector Sportstar, hamfisted Sunfish discovering the limits of aileron travel in a crosswind landing. To put that another way, properly designed stops should not bend, including during (legal) training manouvres. If yours are, then the designer screwed up.