Brake Master Cylinder leaking problem.

Well, I fixed it, I found a straight lid from a 75 Cordoba or something in Joes field, but it was pretty rusty, as well was the rubber seal, but I cleaned the seal up because it is real rubber compared to the poly whatever that they sell now, and Joe figured it would seal better. The lid is straight, so I used it as well, and since then no leaking.