Managed to answer a question I have been mulling over for a while now......keep handbrake or not.
Decision: Remove the handbrake
It had always been a point I had laboured over... If I junk the handbrake system I could have less complex rear bells made for my rear rotors BUT how would I secure the car on uneven ground after a heavy track session. Came to the conclusion that I could use chocks to stop the car from rolling and that it wouldn't be a problem.
Now I can get on with having some plain and simple bells made up for the rear rotors.
On another note, I decided that mounting the BOV on the plenum would not be too great an idea so I will fit it onto the charge pipe that resides on the drivers side...
I reckon it'll do just as good a job there!!