Hi Dave thanks for your info, the problem I had was caused by not having the top screw parts that hold the insert into the leg. I bought some inserts years ago ,got them out an put them into the leg but the original top fastener won't go back on . Luckily I had bought another set and when I opened them they included the top bit , problem solved . Tried to upload picture but site won't let me. So anyone buying inserts check the top screw fasteners are included unless replacing existing inserts. Cheers Col