Update on the 4 wheel disc conversion,
I was happily running it non boosted , with servo delete and pondered putting a Vacuum booster back on to make the most of the discs but the thought of a noisy vacuum pump turned me off the idea. Then a Tesla iBooster came up in a discussion on an EV forum as an alternative to retrofit into EV Conversions.
So I purchased a Bosch Gen2 iBooster from a smashed Tesla Model3 .
I made a simple adapter and fitted to the Landy pedal box. To say the brakes are sensational is an understatement and totally silent.
Attachment 184624
The booster is in failsafe mode so does not need to see a CANbus but has the facility for "brake by wire" so could connect it to a dash panel switch to hold the brakes, be useful for example if your stuck on a hill and want to get out to hook up a winch etc, same as having your foot on the brake. in the event of electrical fail the pedal just connects straight to the master cylinder as I had before. In the event of a hydraulic fail , eg broken line , the pedal shudders , like ABS pulses. to warn you of a problem , you wont have otherwise known till you needed the brake.