Hey all, I'm in the process of rebuilding a brake master cylinder for a MK2 triumph 2000/2500 ( Lockheed, the one with the 13/16 bore, tin can appearance). The rebuild kit from Chris Witor contains all the rubber seals but is missing the dished washer!. This dished washer sits between the piston and the spring cap. Is this typical? :-/ (it seems to be) and if so whats the best practice? I would imagine this washer stops the piston sticking to the cap. Any help appreciated here.