Has Anyone Seen a Knob Design with a Wide Top and Narrow Bottom for Micro Synths?

Came up with a new 6mm knob design for a micro Synth I've been trying out. This works well for what I wanted (a bit more grip, and clearance from the other knobs below) but I keep thinking that something similar must exist already. I've looked around a bit, but has anyone seen a design like this, where the big part of the knob is on the top and the skinny part is on the bottom? If not that's fine, but maybe I'm reinventing the wheel?