Do you need it to lower down? I don't think so. The best I've seen so far was a guy that used a 10" sewer/water pipe that they put in the ground that he lowered down. That worked slick.
Lots of plans for these frames on the internet, plus plans how the lowering can work with a hand winch. Just need to do some googling. I have a FREE 16' old camper back in SK that I will be fitting up this summer for next year. But I won't be lowering it to ice. Just some sort of way to close it off.
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