[Ford blue blood]

Originally Posted by KULTULZ

... hmmpf ...

I have no experience with this type of braking, so bare with me please.

So the theory is to use a frame rail mounted MC without reservoir(s) and the weight of the fluid in the remote reservoir(s) and lines will prevent the brake fluid from draining back (gravity) from the caliper (without a RV) as the MC itself will be/remain full?

Eliminating the RV would rid the problem of a slight drag on the rotor.

That is correct. If you look down the reservoir you can see the piston opening to the bore. Push the piston in and it closes the reservoir from the piston and compresses the fluid to operate the brakes. Release the piston and you can see some of the fluid return to the reservoir , especially if looking at the drum side.