SummaryA knob that can be screwed with M3 x10 socket cup head bolts to hold on a side panel window for a Replicator 2 or 2X A DWG file is included for laser cutting out a window in 2mm clear acylic. 3.3mm diameter holes are 163mm apart from each other on a 210mm rounded edged square thing.InstructionsYou will need 8 M3X10 cap head (or phillips head) bolts with matching nuts and washers. Laser cut DWG file in 2mm clear acrylic or make by hand.