PWM Fan Controller and Switch Panel for 2020 with STEP files

I recently installed a more powerful blower fan on my delta (in my WT-LC electronics case https://www.thingiverse.com/thing:3052975), but damn if it doesn't sound like it will take off. To tame the fan a bit I needed a PWM controller (for a 3 wire fan).

This case has 2 options, a fan controller with 3 switch punchouts and an option to have the fan controller, with one switch and one LCD voltmeter. Both use the same base, but the top and face plate ("FP") parts will be unique. There is al