Wouldn't you want a "true" mechanical connection for the parking brake. The Mico Lock I use at work merely blocks a hydraulic brake line that has been energized by pressing the brake pedal........but, I just went to the Mico Lock site and they have mechanically applied floating disc brake calipers..KOOL!
http://www.mico.com/literature/cbrakes.php3 Steve,
I knew you had it in you..bravo. A six pack of Brown Derby is headed your way, compliments of Joker.
Stuart