Thats all fine, until you get an MoT tester who's insistent on being an arse!
Mine failed, I had to rip it out and reinstall the spring for the pass, then put it back on afterwards. Most
Real men hacksaw the ratchet mechanism off their handbrakes
If you've got an MoT coming up in the next week or so - just leave installing it until you've passed the test, then you dont have to worry about it until next year
It does It's tapered so it goes tight when it's pressed in, and stops it from coming out and locking the handbrake on. Also it allows you to flick the button out with your thumb and lock the handbrake on, so you don't need the spring any more.