Diyeeni Anodized Aluminum Mounting Plate, 3D Printer CNC Build Plate, Mounting Board, CBeam Gantry PlateXlarge for CNC and 3D Printer Hierarchical Performance Improvement

These are nice. I used 7 of them with the clear wheels.

Machining work is clean and the anodizing looks good. But I literally tried to make this fit everything in my giant box of 3D printer / extruded aluminum box and it doesn't align with anything. None of my spindles, none of my laser modules, none of my extruders. The weird thing is, there are a lot of hole patterns that appear to be laid out in a very specific way. For what, I don't know. I haven't found a use for it, but I suppose it may come in handy as an adapter if I drill some new holes.