Improved Pen Plotter tube for UMTS (parametric)

This is an improved version of the pen tube for Falu's Modular System for A1, P1 & X1 Series. I found the pen tubes to be better to print upright but the original design has issues with supports in that position, making it not clip into the toolhead clips properly.

This design removes the problematic overhangs and allows printing vertically with no supports. It is also a parametric design so you can set the exact hole diameter you need for your pen. Just make sure you leave a little extra room so it's not a tight fit.

Now labelled with the hole diameter on the tube so you can quickly identify them when swapping pens.

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