Take the lever blade out, push the metal cylinder out of the hole where the screw secures it to the lever body, take the red knob off take the blade completely apart watch carefully how it disassembles as you need to put it back together, now.. the small piece of metal which the red knob fits, take it and unscrew everything from it and dismiss them so you can see all the way through it now put everything back together leave the red knob off and find a screw that fits into the bit coming from the lever blade. that should then be done! Ben Wiki Guide to TPA Fixage! better than my explanation