Make This CAD Model w/ Only 1 Sketch

I am using Realthunder's branch of FreeCAD. Download the latest version for your system here:
https://github.com/realthunder/FreeCA...
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Mass Properties macro with TTT materials:    • FreeCAD Mass Properties (For TooTallToby p...  



Practice the model here:    • 3D CAD esports - TOURNAMENT HIGHLIGHT - Ma...  

24WC-05-RIGHT ARM MOUNT