From the start I found the standard knob of the Prusa i3 Mk3 not especially pretty and/or practical. So I designed a kind of mix between rocket fins and tech-equipment-knob.
The socket is the same as on the standard knob, so it should fit nicely.
v1.0 is more geometric and a bit shorter, v1.2 has slightly curved and longer fins.
added brim in my g-code, because I have a hard time getting prints to stick on powder-coated PEI sheet.