EMG EXG Guitar Expander

It feels solid, the turning feels smooth.
They don't sell a long shaft version and I think that's a big shame.
Out of their three "exotic" tonal controls, this one is especially interesting for humbuckers. And yet we cannot get one with a long shaft!
I honestly think you're paying too much for what the parts cost of these things are, you mostly pay for development costs and profit greed.
Maybe someone figured out how to build one of these from parts themselves, but I haven't seen this specific EQ control anywhere else, aside from simply having a 3 band EQ onboard.