I bought a 26mm (6 sided) socket specifically to hold the stator plate side nut to tighten the primary clutch nut. But, it does not fit!!! I read the instructions in the FAQ and most people use a 26mm spanner, heated and bent to shape. But, that doesn't explain why my socket won't work? ??? It simply doesn't fit over. A 27mm socket seems a little loose. Can anyone explain?