Modified from an existing design, fits with a 5mm x 3mm circular magnet. Glue needed by the way if you want the magnet to not fall off whenever you take finger rest off, since I made the hole to be 5.5mm wide. If you'd like it to fit with any other magnet size below 8mm in diameter, feel free to leave a comment, I'll modify it if I'm available.
Please print with supports on and ironing off (or else it'll look quite messy.)
Made the bottom thinner from 1.4mm to 1.0mm; made the rear brim smaller so it won't bump into palm anymore; got rid of those unnecessary small fin clips cuz' it already has a slot for a small magnet.
A bit of heat gun post-processing might be needed for the print to completely fit with your mouse. Just heat it up a bit and try pressing the rest against your mouse.
The author remixed this model.
Made the bottom thinner from 1.4mm to 1.0mm; made the rear brim smaller so it won't bump into palm anymore; got rid of those unnecessary small fin clips cuz' it already has a slot for a small magnet.