[alanwoodieman]

dot 5 is great, been in my 40 wagon since 1992, but there can be problems-it is super slick, has very little viscosity (small molecules) will leak just about everywhere unless new copper "o" rings are installed, just rebuilt master cylinder more for my peace of mind than anything else-slight wear on the cup and NO rust anywhere--what caused all od your problems-did you use repro brake cylinders-where did you get them? answer a few more questions and maybe we can help you find the problem