[maviczap]

TBH I've had similar problems with road cranksets, the tensioning bolt thingy are different diameters and lengths. Unfortunately all my cranksets are road cranksets, so no use to you, but I'll see if I've got any tensioner thingys which are 22mm. I have a feeling that XT and Dura Ace share similar dimensions. St Johns Street cycles would be my first port of call for the tension thingy.