Side window panel holder for Replicator 2 or 2X

A 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.