As I was browsing youtube I noticed that people were buying castor wheels and similar rolling things to put on the bottom of their trash cans so that it rolls around. I thought hmmmm I could put these on the bottom of my ink tower instead of using a lazy susan.
I found these on Amazon here.
For a box of 8 pcs I paid 6.49. They come with a circle tape pad to adhere them to your item.
They work very well, they allow my ink tower to slide and turn on top of my desk and that is exactly what I was looking for. I love it!