Heya Wozza, Have you checked the internal hex and thread for size, if it's imperial or metric?? I've seen something like that somewhere, but not sure where? kind of looks like something I've seen either in a pile of Jappo stuff, or somewhere in the heads of my Guzzi, but it's been so long since I needed to pull that apart I forget what's in there!! Maybe when I get the A10 back together I'll do the T for exercise