The cheap dot 3 fluid does not take into consideration the master cylinder as well, which is usually the worst failure, as it kills all your brakes.....
As for the cast cylinders, I am sold on them. Just make sure that when you change your oil, you give the bleed screws and the lines an 1/8th of a turn to prevent them from seizing (this should be done on the aluminum ones as well..) I have never really had any issues with the internal rusting (as the truck is driven everyday and thus the fluid reaches all parts of the cylinder on a recular basis to prevent corrosion in them.) The best part I like about them, is that if they do leak, the honing is fast and easy... (I have tried to hone the aluminum ones to no avail, usually causes too many score marks....) but you have to buy the good ones, the girling brand....
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Andrew Barr.
1972 Series III 109.
"the Tin Turtle"
"However, that was his ploy and I caved....totally caved...   LOL!" Jellijo 
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