Added support for a 15x20mm Cable Chain.

Amazon Link (non-affiliate): https://www.amazon.com/gp/product/B08124SPVH/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&th=1

Update 5/20/20:

• Increased the height to prevent the cable chain from ramming into the frame
• Added a keyed slot to prevent rotation of the carriage mount
• Added a new mounting method, parallel to the frame. Reduces the amount of cable chain by a decent amount
• Increased diameter slightly of the insertion cylinder

Category: 3D Printer Parts