adixon
what you need to do is get some quick steel, local hard ware shop will sell it ,take the cone off that slipps and on the other bit that it pushes down on when screwed tighter put a small layer of quick steel around it evenly.not to much as you can add more but as it states quick steel is like steel,smooth it off as explained in the instructions wait 1 hour and it want slip again, well mine has'nt
