This rebounder would be really good had they thought more about the middle telescoping support pipe. The problem is that it doesn’t tighten enough to hold the telescoping pipes tight enough so that they don’t slip which allows the angle to constantly adjust by itself. I thought we had possibly assembled it incorrectly but nope. It’s assembled exactly like the instructions say. I may decide to drill holes in the pipes myself and install a cotter pin system so I can lock it complete down. The adjustment knob that doesn’t tighten down enough is between parts 11 and 12 in the manual. To work properly, tightening this down should prevent parts 11 and 12 to slide in or out but as mentioned, I use all my strength to tighten it and it still slides. When we put the unit in the grass, it doesn’t move that much so it’s fairly stable. But after prolonged use, the angle moves out of place due to this flaw.
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