Cat litter mat with tray

Not a fan of most commercial cat litter mat.

I want it modular and can easily to separate to clean.

!!! Caution !!!

When installing the magnet, be careful about the polarity.

The polarity should be 180 degree rotation symmetry, ie. when the tray rotate 180 degree, the polarity should be the same. I share one example in the photos

I also share fusion 360 file for large mat/tray and one of small mat/tray( other 2 are just different parameters. ), modified to feat your need.