Greg, I was thinking of a dual reservoir system where only one section is leaking so at least you could have some braking.
Do you have a dual reservoir?
I suspect you did the correct thing with the brass replacement.

I keeping thinking about brakes failing because a 13 year old kid didn't know the proper way to assemble parts.

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."