Hangtime Hook Accessory knob

I created this knob as an accessory for the Hang Time Hook by Ridgline Media Systems. You simply attach this knob to your battery pack or whatever and it then fits into the slot on the Hang Time Hook.

I'm using it to connect an Anker 20000 for my phone on the Hang Time Hook. I used a command strip as the adhesive so that it is removable. Seems to be working well.

PS This is my first 3D design.

UPDATE: Added another version. This one includes a spot to mount a Command strip to for a more secure connection. Make sure your cables and phone, etc all line up before you mount the Knob.