My friend Roger uses a crank pulley system and manually cranks air conditioners up and down a ladder. I thought this was a great idea, but decided to go a step further and get a motorized winch. It works very well attached to this old roof shingle pulley system. I can secure the air conditioner and with the push of a button, raise it up to the RV roof. It makes the job much safer and easier for a one-man team.