I do have a spring that keeps the throw out off the diaphram. It isn't shown in the picture because I took it before I had that set up. But is connects on the bottom hole of the fork and runs forward to a hook I fabricated straight in front.
My master cylinder has a boot in front of the booster canister, I don't think I could get a spring that wouldn't interfere with it.
Unless I used a spring that was 2 or 3 inches in diameter.
Is that what you had in mind?