Lack enclosure side spool mount

I wanted to be able to have a printer on top of my enclosure so I made this. I printed it in petg with 3 perimeters, I may have overdone it, I could hang on this thing. I used a 20mm od x 500mm tube. https://www.amazon.com/gp/product/B00RX6QTHC/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1