"Over-Engineered" Paper Roller

While converting the d.i.d. - Scalable Pen Plotter project to work as a vinyl cutter, I managed to get everything working reliably except the provided paper roller design. I went through multiple different designs but ended up sticking with a definitely over engineered solution. It consists of a captive spring and o-rings riding on a bearing.

Other than the bolts, you will need these parts:

1. Springs
2. O-Rings Can be found elsewhere aslong as ring matches these specifications: Inner diam.: 10 mm Outer diam.: 15 mm Width: 2.5 mm
3. Bearings 624ZZ

Important Note:

This part is only compatible with my redesigned V2 Drag Knife Tool Holder vinyl cutter attachment.