I planned to add to an older thread, but a warning came up and said the thread was old and recommended starting a new one. I just want to start out saying, all campers (both human and popup) are not the same. Our camper has a 16' roof with AC on top, and it takes some effort to crank it up, mostly a two handed job. It was the same before I rebuild the entire lift system. After reading several threads about the socket Genies working great to lift, I decided to give it a try. I order the 625, because our Jayco uses a square 7/8 socket. I got out my old craftsman hammer drill (not in hammer setting) and nothing, it would not even try. Good news, the socket Genie fits just fine. Then I read someone post having a 14' roof with AC and used a 19.2V hammer drill, so I bought this one - http://www.craftsman.com/craftsman-c3-19.2v-lithium-ion-hammer-drill-kit/p-00939016000P?TecPara=181_ . Again no luck with a full charged battery. I am going to try another stronger corded drill and see if that works. I will update later. If not maybe a gas powered auger!?