Knob quarter-20 stubby

This hardly counts as a remix, but I really liked the knob in the "T-Slot for 1/2-20 carriage bolts" and have printed several, but I wanted some short ones to hold down templates with a quarter-20 hex head bolt into a threaded insert in my waste board. Shorter so that they don't get in the way. I really liked the softened edges of the design. Easier on my old hands. The head of the bolt inserts nicely and stays put.