Dial Indicator Case Backs (Three Screw Versions)

I purchased a Chinese dial indicator which had a three-screw case back with a large protruding mounting knob. I needed a flat back, and the four-screw flat case backs already available online were not suitable. So I made this one.

The dial indicator's original case back mounting knob was too large to fit into scootarida1's case:

https://www.thingiverse.com/thing:4292336

So I also made one with a smaller knob that would fit.

Both versions are included here, along with the FreeCad design file. Using it you can move the knob around, change its size, or even convert the case backs to four-screw versions.