We had the same problem on our trip to Alaska last summer. I ended up tightening it too tight which damaged the tubing. FWC provided me a new assembly on warranty. I then went to Ace Hardware and purchased two 1-1/2" washers, one nylon and one SS. I also purchased a SS hose clamp. I put the hose clamp, the SS washer, and the nylon washer on the tubing above the table mount so the plastic in the mount is against the nylon washer. Tightening the hose clamp around the tubing locks the washers in place and allows the table to swing side to side without sinking down. Problem solved.