Re: have a look at this site ....maybe it will help
Wonderful writeup and visual aids also!.
Update, I had dropped the 4" rod in the kitty litter covering my floor and didn't hear it hit.I had put the brake MC on the brake booster without it.Put it back in but may have switched the ends on it.
Put that back in, bled the brakes and all was well till this morning when I saw a big puddle of my Dot 4 on the floor. Reservoir was still full.The excellent article showed PS fluid leaking because of the O ring, I was previously and still am leaking brake fluid.