My old brake booster was leaking ( you could hear it hiss when you held the brake pedal). So i replaced it with another used unit and everything is fine, no hiss and no hard brake pedal at cold startup. But now the calipers stick if i do a hard sudden brake. Is there an adjustment to help this out or is it just my calipers? Seems the booster has a nut where it plugs into the mc does this affect my situation?