Roadmaster BrakeMaster here, just finished up installing it after months of debating, checking out the reviews, and buying one and sending it back afterword, and whatever else I could find info from. It's more of a permanent type of system, tied into front brake line, to a promotional valve, from their an air compressor changes to air to my Jeep Wrangler, disconnecting an air line is much better than a hydraulic line anyway. Main difference from some of the above, my toad brakes work off the Motorhome brake pressure not a switch, or light or inertia. True proportional braking. I had to go this way as inertia operated type would interfere with the exhaust brake for Ford. SMI with my wrangler, my foot would hit the position where the unit attaches to the brake pedal bar. The Brakemaster had all the pros I needed.
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