Hello-We are very new to sailing. Just bought a 1993 MacGregor and are getting her ready for an outing. Problem: the Pop-top won't stay up. The previous owner installed forced air lifts (4) that help hold it up but the top sways and goes crooked after just putting it up. Not safe or fun. We attached it properly with a screw to the mast but it is too wobbly. Afraid to let the kids touch it. Any advice on what to buy to get it to stay up safely without moving/wobbling? I think the lifts that he bought are too thin but not sure. Help! Thanks everyone.