I guess picking up mowers and putting them on the bench is partly to blame for me needing a hip replacement in the next few weeks, I have been using a ramp to get the mowers onto the bench lately, but even that has been a bit difficult.
MF when I work on the 24's that is how I do them, I have a frame that the front wheels drop into then I can stand the mower vertically to change the motors and work on the blade carrier/belt.