Re: 4-piston disc brakes
Well I picked up a TRP slate t4 rear brake for the right side lever. It comes with a full bleed kit along with two sets of hose fittings for changing lengths. I shortened the hose down to what is needed for the front and skipped the bleed.
Man what a difference! A real one finger brake! During installation and just test feeling the lever you think "this brake won't stop me at all" but I guess that's how the 4-piston is. Super light feel and stops with no complaints. Highly recommend! It's $120 for one set and will accept the finned shimano pads as well, so the support is there.