This is designed for the Atomstack A5 Diode laser. This print should help you find where the material should be placed so it is directly under the laser nozzle.

The rectangular openings are for 3/8" x 7/8" x 1-7/8" brick magnets, link: https://www.homedepot.com/p/Master-Magnet-3-8-in-x-7-8-in-x-1-7-8-in-Heavy-Duty-Block-Magnet-2-Pack-96284/203613128

This will work with or without magnets or a steel piece on your waste board.

I have only been testing this for a couple of prints, so I am not sure if it works for every situation. Please leave a comment with your feedback.