The red is supposed to float in the tube. The screw walks it back and forth to change the leverage between the two masters. It allows the pedal and master pushrods to stay put but change where you are pushing.
Just need a lever switch for the brake. Finger on pedal keeps the switch compressed until brake is applied so the finger swings away from the switch.
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Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS
viewtopic.php?f=5&t=13225&p=134742Simple Spring select
viewtopic.php?f=5&t=11815LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12