For what it's worth all the rotary lifts I used all have limit switches at the tops with a padded bar that rons across so when the roof hits it stops the lift. Just about every decent built lift I've seen has this except the bendpak that we had that kept dropping trucks off the back arms.
My bendpak has a shut off bar up top. I learned over the years. Stories get twisted fast on facebook. I also seen guys install there own lifts and was half assed.
Rotary, Forward, Direct Lift, and Mohawk are all produced in the same facility at one time