See the official video:https://youtu.be/oS7ZtBNh2hEFollow the Mikolas Zuza's tutorial article on:https://www.prusaprinters.org/cheap-simple-3d-printer-enclosure/Plexiglass dimensions:3pcs: 440 x 440 mm, thickness 3mm2pcs: 220 x 440 mm, thickness 3mmNOTE:Adjustable spool holder STL file may not be a…