Magnetic Mount for Powerbar (Chinese jlt-05040-au - OEM)

I was looking a magnetic power bar to attach to my printer stand for my 3D Printer, but I could not find one that really met my needs. So I decided to create a magnetic case for an off the shelf power var,

The power bar I picked was a Chinese made [model jlt-05040-au] 4 ac outlet / 4 USB power bar that is sold under a lot of names both on Amazon, Walmart, and Chinese Import sites like Wish.

Example: https://amzn.to/2Oei76F

I originally designed the bar case to use for small round mag