Spotted a different roof lift gin pole design in this photo of an Australian A'Van Aliner. They have a permanently welded on gin pole on the hitch, a hand winch, and a single cable going up the front roof, which connects to a pair of cables attached to the top extrusion at the rear of the front roof. Crank the winch and up she goes. Neat. No internal lift springs (or gas struts) required.