This riser was created specifically for the Two Trees TTS-25 but should work with any similar laser engraver. I have attached the original Freecad document so you can use the spreadsheet to change dimensions without needed to know any cad stuff. The bottom foot is what I'm calling the plug and the top pocket is the socket. It's modular and stackable so you can easily add or remove height. You can mix and match risers to stack the right height for your project.