I put a TRP Spyre brake on the rear of my CAADX, to replace an awful Promax brake. The old brake is so bad that I am scrapping it rather than storing it for ever in my spares (junk!) box.
While I was working on the bike I took a look at the front brake (a TRP HY/RD) and realised that I had made a mistake when I originally fitted it. I had put some washers on the wrong side of the post mount spacer. That meant the calliper was slightly too close to the edge of the disk and the pads were too far in relative to the braking surface. I sorted that out. It looks much better, might work better, and sounds quieter.
The cones in the rear hub had some minor pitting which caused graunchiness as the wheel rotated. I will try to find some replacement cones (or buy a new/better wheel) but for now I have carefully buffed off the sharp edges of the pitting. It's a bit of a bodge but the wheel does rotate more smoothly.