Paper Towel Holder - v26

***Edit***

On second thought that is going to be really hard to get it to poke out from the inside. 
I have redesigned it so that the retainer can be inserted from the outside. 
I know this will work!

Enjoy!

I have this mocked up, I have not tested it yet.

uses 2x M3x8mm Button head cap screws to act as pivot mounts so the end can be quarter-turn installed.

quarter-turn for one side only. (MainBody1)
other side is stationary. (MainBody2)

I have slotted the MainBody Bracket so that it can hopefully accommodate your preferred Paper towel length :D
The screw holes are 40mm apart so you should also be able to mount it to your skadis boards.

use the KnobPeg to glue the Knob to the TubeRetainer. 
So that when all 5 parts are printed and assembled there's only three parts: the MainBody1, the knoby-holder thingy, and MainBody2.

then take the two screws and run them in from the Tube Retainer side to the knob side, so the heads are facing the paper towels (see image).