Spinning Knob Topped Handle for Threading Tap

I recently made a tap handle for use with small taps to make threaded holes for screws ( http://www.thingiverse.com/thing:844370 ). This is the same tap but with a knob at the top that spins so you can apply pressure with one hand and spin it with the other. The whole thing prints as one object.

Here is a video of it spinning (I'd use youtube if I could without giving up my phone number, but I can't): https://vid.me/bnQW

The way it works is that the knob is supported by a little 1mm dia