with the brakes, make sure the sliders are free, and the pads aren't stuck.
Basically the brakes are single piston, on the inner side, and the outside works by way of sliding bolts, you'll see what I mean when you look at them.
There are 2 13mm bolts that screw into the top and bottom sliders, and hold the piston part of the brakes on.
Remove the bolts, and make sure the sliders can turn freely, and move in and out, if not then the brakes are not working as they should.
to free them up just takes a bit of time.
Also make sure there is no crud stopping the pads from moving freely.
This should be done as regular maintenance.
Once you have made sure all the pistons are moving, and the sliders are free, and the pads are free, and the fluid has been changed, then think about the MC.
The above just takes time, and no cost, except for maybe a bit of copper grease.