[elgyqc]

Originally Posted by Homeoboxter

I like that you attempt to fix everything that most of us would just toss and replace. Hope it`s gonna hold

Thanks, it's half because I don't have money to throw away and half because I don't like to waste things that can be fixed... and an extra half because I enjoy the challenge.
My only worry with the reservoir is that the plastic is so old it will fail somewhere else, like the fitting for the vacuum line that looks a bit fragile. But now that I know what I am doing I could remove the reservoir with the engine in the car, although it would be a big PITA.