Hello, I hope you find this helpful.

Note: The "merge" tool has been removed from Fusion360. I made this video to show a quick option for most files: https://www.loom.com/share/ef309e6709...

Also, Fusion360 moved the location of some tools shown in the video. The easiest way to find these tools is to use the search tool shown in this video: https://www.loom.com/share/f8c24feb30...

This video is in response to a video comment requesting help with this .stl edit. If you would like more videos on engineering/CAD/or electronic design, please feel free to reach out on my discord or leave a comment with a question.

You can ask questions and make video requests in my Discord:
  / discord  

You can download the Thingiverse file I use for this example to try yourself here:
https:www.thingiverse.com/thing:4201161

You can also get your free personal use license for Fusion360 here:
https://www.autodesk.com/products/fus...

Cheers,
Jared.H