Good looking toilet roll holder, preferably in a mat color.
Clearance between wall mount and the main part could be a little less so the main part sits stiffer on the mount.
Yeah, tolerances are always tricky. Very infuenced by e-steps/extrusion multiplier (also not helped by a number of filaments that are showing up with small diameters ~1.70mm). If you want to tighten it up a tad, bump your extrusion multiplier up a couple of percent.