I have been looking forward to adding this accessory to my collection of 3D printer tools for a Flashforge Creator Pro to help improve the leveling of the print bed. I came up with this design based on the magnets I found at home.

I took some careful measurements with a digital caliper of the key components and began modeling my idea in TinkerCAD. One of my goals was to keep the construction as simple as possible and with the least amount of support material. I printed the bracket on its side, came out great!

The dial indicator shown in the pictures is a: TEKTON 7169 0-1-Inch Dial Indicator I got from Amazon

Button magnets are: 3/4" (19mm) in diameter x 0.37" (9.6mm )thick for two magnets