Controller Grip

Someone in a Quadcopter Youtube Live Stream asked about longer knobs or grips for their R/C Controller because of a hand surgery. After I design this in CAD he decided that they may be too heavy, and would flop around when activating the switches on the controller.
I agree with him I think they're too tall. He's looking for a larger ground station controller, but I thought I'd put these on here just in case someone wants them.

This requires 3mm knurled nuts.