Helical Gear Bed Level Knob with Captive Nut

I really like the "Captive Nut" idea, and I make a lot of gears, so I thought I would combine them in this print.
I didn't use the Cura plugin to pause the print. Instead I monitored the percent status on the Anet display, and paused at 65% to insert the M3 nuts. I had calculated the layers in Cura (I think it was layer 46 (of 69 total) just before it would start to close the hex pocket). Worked great.
I modeled this in Fusion 360 with the Helical Gear generator, then modified it with the hex