My team had some pretty good experience using versaplanetaries over the past years.
I was assembling ours today with the 775s pro on a 25:1 reduction (2 stages). 8 motors and 8 transmissions total. I had 2 of them overheating more than the others. (turns out stages were rubbing on each other) Gears are mounted on shafts that tend to get loose. We always punch them to avoid them getting loose and grinding on the stage below. We also used a different grease with the 775, since it has a much higher rpm. You want something more fluid, that will not put too much effort on the gears. After tuning each motor and gearbox, I got them at 3 to 3.5 amps each on 12V. No more sounds of gears grinding or overheating, and it sounds like a jet engine
