I had thought about using a line lock breaking device. The way they work, is with a switch plummed into the brake line. You just step on the brake, and while holding it down, you flip the switch and the pressure stays in the line, locking the brakes. To remove the brake, you just flip off the switch and away you go. If would be much cheaper to use a line lock, not to mention way easier to install too.
Jose
Jose