Thought that was what you meant, and I wouldn't recommend it.
Tried it and I dont like it, plus I'm usually so hard on the brakes
that I dont want to take any pressure off the pedal or else I'm past the corner,
and I dont consider myself a late braker.
Only reason I can see to do it is that your syncros are rooted.
I believe a better thing to do is brake, slow down, then down change.
So many people downchange almost as soon as they start to brake,
which is hard on gear, can lock the rears, and causes massive engine revs.