@Vince.Fab For a “Hardcore” alum milling challenge in a different direction… this does look like alum… doesn’t it?
https://opensourceleg.com/how-to-make/
Note they have .STEP files there (Fusion 360 can load them), and the pieces all look like stuff that could be done on a (calibrated) 3-axis CNC. Like an S3.
Note they’re quoting ~$15.6k for the machining. Wow.
There’s a video about the project, which puts it in context:
Seems like a positive thing. 