This is the mouse I bought

Nulea M501 Kabellose Trackball Maus, Wiederaufladbare Ergonomische Maus, Präzises und Reibungsloses Tracking, 3-Geräte-Verbindung , Kompatibel für Mac, Windows.: Amazon.de: Computer & Zubehör

2 pieces m8 hammer nuts and 2 pieces m8x20 hexagon socket screw are required

I have printed the number of walls so that the support surface of the screws is fully printed to make it very stable for motion

Please be sure to hit like & post a make, I'd love to see your prints and rigs!