Compatible with Planck rev6, and also the upcoming Sol keyboard.
There are future plans for a GB that will be cheaper, but it will take time to source the knob and encoder, plus testing to make sure they work.
Selling these at cost. Don't waste money buying a knob and encoder from two different places and paying shipping twice.
So I'm all out of these encoders, but I will be getting more in stock within a month. I will offer a cheaper option, along side some premium options as well!