I rounded one of my master cylinder screws. Easily done when they are rusted in, brake fluid is incredibly corrosive.I bought some reverse thread drill bits from b&q for a fiver and got it out pretty easy.Can you get a service/seal kit for the master cylinder? That might be worth considering.I would suggest changing the seals in the caliper but you say they are all moving freely.Else it might just be worth bleeding especially If they have been binding and overheating.
Did you top up the brake fluid recently or put new pads in?
Any recomendation on new brake lines?Many types on EBay
Any recomendation on new brake lines?
In the past couple of weeks I've noticed that my brake lever is getting further out as I ride and the disks are really heating up, so much so that the last time I got home I could feel a real rolling resistance. I just went out to clean the pots but found it a real struggle to push all 4 back into the caliper...