more brake info PLEASE

I flush the lines w/ ethanol, then blow air and dry a few days open. I have always done this when changing wheel cylinders and hoses, so don't worry about degrading any rubber. The ideal proportioning depends on many things, like cylinder and caliper sizes and tires. An adjustable valve lets you dial it in on wet pavement, but a fixed factory type is probably close enough (can cost more). In Canada, I would refresh the fluid every 2 years or so. I have long used silicone fluid (DOT 5), so no more worries.