Well I tried a 14mm - too small. I used my digital calipers which I should have done the first time and the bolt is 15mm so I picked up a 15 mm socket. The walls are too thick of course... How did you go about grinding down the walls? Or should I just try to find a thin walled 15mm? [MENTION=170517]rccardr[/MENTION] Do you recall the exact socket that you use Doc?