I had the same problem on my P18. I found that the hole that the hook pin goes through was a a little reamed, so I added some resin and then re-drilled. That took out a lot of the slop and got it in the right angle. Merely tightening the two nuts might help, but if they were loose and reamed the hole, it won't fix it. I also filed the inside of the hook so that it was more of a hook and not so flat. Granted, it set me up for failure if I were to run aground and needed the kick-up feature, but it sure kept them locked down. I just made sure that if I were near shore, I had the rudders unlocked.