Alan, don't get me wrong, I'm not looking for a forum fight!
This subject has been discussed on more than one occasion, Moglite and strain gauges?
What do we want here? An evaluation of a winch for static recovery work or a winch for use at a winch challenge?
If you take the vehicle out of the equation then are we not actually bench testing?
Are we looking for endurance? This could last some days!
Will electrics be limited on battery capacity, alternator capacity motor cooling?
Will hydraulics be limited on oil capacity, oil cooling?
Will the evaluation require the engine to be running all the time?
If this is approached as a hog roast with some winch comparison thrown in for fun it should be fun, if it is taken as a definitive, end of story, my winch is the best,
scientific evaluation it is doomed from the start.
The hydraulic/electric debate is like religion, we all preach love of the common winch but if you don't worship mine I will kill you!