The problem may have been only with the very early units. If I remember correctly the fix to the problem was to saw through one side of the hold down. I can't remember what the sympton was to require this mod. It's been a bunch of years ago. I didn't get to use mine because of lack of pv clearance(machine shop calc goof) so I sold them and went to the Harland Sharpes. They were very nice rockers and it upset me that I could not use them.