I just bought a monza quick release cap from mototwin, as i've developed "Popeye" forearms trying to get the original undone! All i can say is, whilst slightly expensive at £87:00, it looks great and pops open easily, and my forearms are now retuning to their normal size. I had to make different thickness shims to line the cap up straight though as the ones provided were all the same-0.016".
