A4 Pen Plotter - Additional Parts (Servo)

I couldn't add models to my make so I had to remix to add them. Copy and paste from it:
CarriageSrpingV1 - I ended up making a Carriage Spring because there was too much slop. When a direction switch was made the pen would stay still until the slop was gone and not make letters. It just slips around the normal carriage with some springs between the two to give it tension to the rail. The cross-bar that the servo actuates could have done this also but my stock was a different size.

PlotterRol