Flashforge Improved Spool Holder

When I build structural parts, I don't care so much about saving a bit of plastic, I care about having something which can be used, and abused, with no real risk of damage.

So I made this for the following reasons.
The spool holder that comes with the Guider IIs (and possibly all other Flashforge printers) simply doesn't hold many of the spools of plastic we have.
Additionally, they are tricky and annoying to get on and off when the printer is against a wall.

I found some designed on here, they all looked weak, but I have one a try.
3rd time putting a 2.5kg spool on it, it broke.....

So, this includes a base, which stays in the printer.
The spool holder then slides into this base.
I have included 4x different sizes, but as usual, you can customise your own on OnShape.
https://cad.onshape.com/documents/31998f41d0ef572f61231cda/w/50aaeb9229dc330fa90e4c95/e/77c414441ddd7e3c3f35141f

**Warning**
On one side of the printer, a piece of metal is attached to the print platfor