Parametric Magnetic Cable Clamp

I've designed a parametric magnetic cable management clamp to attach the end of any cable to a magnetic surface. Potentially interesting parameters are (all values in mm):

cable_diameter: diameter/thickness of the cable to be clamped.
magnet_depth: how deep/thick the magnet is.
magnet_diameter: diameter of the magnet.
screw_head_diameter: diameter of the screw head.
screw_head_height: how tall the head of the screw is (used to recess the screw in the top of the clamp).
screw_shaft_diameter: the diameter of the shaft/shank of the screw.
wall_thickness: how much material to leave between magnet and cable, screw and magnet, etc.

I included some STLs of various sizes, and I've named them per the following:

Cable_Magnet_(Bottom|Top)_(cable_diameter)C_(magnet_diameter)x(magnet_depth)M.stl

All pre-included STLs assume the of use M2 self tapping screws (panhead).