First Shot

 It works!  Super janky right now but all the pieces work:

Espresso Machine Group Head Machining

 

 The click at 0:41 is very satisfying

Questionable workholding stack:

Fancy "morphed spiral" profiling toolpath came out well:

Inlet and outlet visible

With fittings, shower screen and seal installed, and portafilter locked in.

Proper blog post on the way

Reassembling the "shop"

 More like "heap" at the moment, but it's getting there.