Decided to check the brake pads on the 13 today. By 'eck, it's easy nowadays, isn't it? Two pins, lift spring, pull out pads. Clean, replace, refit. Two minutes a side, tops. Then thought I'd find out what the Quill sounds like with the baffle out. Insert 4mm allen key into bolt; turn; shear bolt. Arse. Can off, dremelled it flush (a drill wouldn't touch it) then push out baffle. Cut through the captive nut with a cutting disc, and the bolt stub fell out in two pieces. Baffle is a three inch long but of pipe, not exactly cutting edge technology. Started bike, endured raucous cacophony for 30 seconds, refitted baffle with new bolt (copaslipped) Fitted MRA screen - very smart. Finished off with a good wash (to remove those Welsh insects), and a dusting of Mer. All nice and shiny, now. Probably rain tomorrow.