Z-Holder (Pen, RotationKnife (vinyl cutting), Laser)

Universal tool (require individual screw holes to be made before mounting).
Sliding Z-axis with spring mechanism/rubber-band keeping pen or knife sticked to the paper/vinyl surface.
Requirements:
2 x 4cm steel rod 6mm diameter
2 x 12mm linear bearrings (or however its called)
and about 3 hours to print it out and put everything together :)