3D Pen Filament Spool

This is a filament spool for a Aerb Printing Intelligent 3D Pen with LCD Screen, Black, 6.4x10.2x20 (available from Amazon).

I was taken with Starman63's original design, however, it didn't work for me - spool too large, spool sides too thin & "perforated" (the axle holes popped out like a postage stamp), mount was too weak, the single mount fixing wasn't the right size for this particular pen and wasn't robust enough, needed a wider offset to accommodate the power cable. It sounds like I'm