Magnetic Eyeglass Case

Introduction
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This Thing is a case with a magnetic mount for eyeglasses or sunglasses. I designed it to have a place to put my sunglasses in a Hyundai Ioniq 5, which has a metal plate to the left (in the US) of the dash, but no good built-in place for storing glasses. This design could conceivably be used in other applications, though.

Printing and Finishing Tips
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For its intended automotive use, it's critical that this design be printed in a plastic that can withstand high temperatures. I used PETG, but ABS or various other plastics should work, too. Avoid PLA; it's likely to soften and deform when left in a hot car in the summer.

The case includes three circular notches in the back of the design. These hold three circular magnets. The design specifies a diameter of 22mm for these notches, set via the `magnetDiam` variable; and their depth works out to about 3.5mm. I used magnets that are 18mm in diameter and 3mm deep. Be sure to use strong m