Good video "how masters work"

Ya know some of these old videos are corny. But I think a lot of people could learn something............

Great info on master cylinders, brake warning switch, proportioning and metering valves, and how it all works

[ame="http://www.youtube.com/watch?v=SgUnbNFXt5U"]1970 Brake Hydraulics 70-9 Master Technicians Service Training film - YouTube[/ame]