drybox spool roller

This is a spool roller/holder for a dry box I designed using cereal containers I bought from amazon. I will post the pic of the finished project soon.

https://www.amazon.com/gp/product/B07K3TPQ86/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I was looking for a roller that will accommodate all spool sizes and I found this https://www.thingiverse.com/thing:3839008. Unfortunately the files are not available so I designed my own with some parts I had.

I used this 3mm metal rods and this linear bearings:
Metal rod: https://www.amazon.com/gp/product/B01731LGGU/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Linear bearing https://www.amazon.com/gp/product/B01B27MH3W/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1