Expanded the parent model to allow for a spool for 105-110mm in width and roughly 160mm in clearance from top of bottom support to the top of the rail. These are the dimensions of a 3kg roll I got with 5-10mm of extra clearance in each direction. The dimensions of that roll were 40mm for the hole. 267mm in diameter, and 103mm in width. If you need it bigger, https://tinkercad.com/things/cfSHuUZZmD7 is the model in a form that's pretty easy to modify. After printing a test, the rail was made a bit smaller to fit properly and with that, this thing is no longer a work in progress!The parts are better oriented now in the stl so it's easier to print with no support.