Another brake bleeding question.
 

I want to bleed my whole brake system before I go up to Deals Gap( Yes I know I procrastinated) and also swap out my Master cylinder as my current one leaks. Now I know that I need to bench bleed my master cylinder and always make sure that it is full when bleeding the rest of the system.

Now my question is that in another thread I read that they bleed their proportioning valve. I was just wondering how to do that as I don't feel having to bleed my brakes more then once. Here's a link to the other thread.
https://www.rx7club.com/showthread.p...valve+bleeding