If you've got someone with you have them push up on the roof at the beginning of the cranking. That's where the most stress is on the system. I cranked mine up solo dozens of times in windy Baja conditions with two longboards and a shortboard up there. Using my brain now,I'd have a friend or my wife help the Heco system.X2 on Heco. I love mine. I use a longer handle made from a sailboat winch handle. I pick up the roof and 2 canoes each of which is around 70lbs or 3 65 lb kayaks all the time. Heco advised me it was not wise to do this. I ignored their advice. So far no problems. Probably raised and lowered it 60 times or more with those loads. I did look at a camper once with the lifting system linked in the first post. I immediately realized it was a bad design if you wanted to carry something on the roof.