> On Tuesday, May 28, 2019, 10:36:10 AM PDT, William Donzelli via cctalk > <[email protected]> wrote: > > Those knobs look like they are cast pop metal or zinc or something, > not Bakelite. > > -- > Will > They are metal for sure. Probably cast. They are smooth, though there's a bit > of corrosion and pitting on them now.There's a set screw at the bottom of the > back side. > Dwight suggest casting one. I've never done casting before but this might be > a good thing to try it on.Would have to drill the shaft and set screw holes > afterwards, and a bit of finish work to make them smooth.It's a cool panel so > probably worth the effort if I can't find one out there somewhere...> Bob
I agree casting might be for you the easiest way to go, then spray it. It's an unusual shape but a good enough copy for 3D printing could be done in OpenSCAD from a few caliper measurements: disk dia, disk rim height, overall height, dip angle, top paddle width, bottom paddle width, top indent length/width/depth and paddle front radius ought to be enough. Steve.
