Nice knobs! Totally agree on drawings and a machining center!!
Knobs sure are an interesting intersection between design and functionality - great thread!
My favorite now is the Emotiva Control Freak - solid alum, just the right spin-ability, nicely machined, anodized, and knurled...and wasn't all that pricey (NLA?). The only thing I wished they'd done was to add a 'push (slap) to mute' function
But some of the vintage stuff is really impressive, back when knobs were KNOBS! and had a Serious Job to Do!
I had a collection of bakelite and ceramic ones, that - wouldntcha know it - I finally threw away one month before I started a project that cried out for them!
I did learn that the ones I liked the most are called 'skirted spinner' knobs...but haven't found one similar yet (grey, ceramic, about 2.5" diameter)...so have moved on to using touch strips instead! (sigh). (not my images)
I worked for a company that made fader wheels by running stepper motors in reverse, run via a large slice off a bar of ribbed aluminum as the wheel...the 'spin-ability' of those things was very impressive.