Parametric Magnet Placement Tool

Print two and put a magnet in each of them. This is the one time you don't want to use one side of the tool to insert the other magnet! The magnets need to be placed into each piece with opposite polarities up. Be sure to add a pause before the printer bridges the hole for the magnet so you can put your magnet in!

I've included STLs for some of the most common magnet sizes, but you can use the Fusion file to adjust as necessary.
 

Parameter reference:

icon: Set this to 1 to include the + and - icons on top of the model, or 0 to print without them.

(You will still see the shape of the icon on the top of the model if the above parameter is set to 0. This is due to Fusion not liking 0 values for extrudes, so when this parameter is set to 0, it makes the extrude depth negligibly small so that it does not appear when put through your slicer)

magnet_bottom_offset: Distance from the bottom of the model to the bottom of the magnet. Default value is 1mm.

magnet_diameter: Diameter of the magnet.

magnet_thickness: Thickness of the magnet.

tolerance: Input the tolerance for your printer. This is added to the hole for the magnet. Default value is 0.2.

tool_height: Change this as you see fit for the height of the tool overall. Default is 25mm. May require a brim at larger values If you have any problems with bed adhesion.