I'm a little confused just what your goal is. Is it:
a.) The e-brake moves either direction without the need to push the button, and it stays wherever you put it.
or
b.) The e-brake defaults to "off", but you can pull on it to engage the parking brake, and it will NOT stay engaged unless you hold it in the engaged position.
"a" would be a PITA, but "b" would be a piece of cake - just disassemble the ratcheting part of the mechanism.
Now, if you want the racing functionality of "b", while still being able to use the parking brake to hold the car when it is, well, parked, then that might be a little trickier. You'd need some way to selectively disable the ratchet. But even that would probably be simple. You could just set up a pivoting c-shaped bracket at the end of the brake handle. When you flip the bracket up, it would hold in the release button for you. When you want the brake to stay "latched", you flip the bracket down and out of the way. :thumbup:
