It seems most printer knobs are either good at precision/comfort, or they are good at speedy rotation, not both.

This knob upgrade truly has the “Best of Both Worlds”, precision using an aesthetically pleasing, traditional “knurled knob” for simple menu navigation, and a finger-loop (large enough for those of us with fat fingers) for maximum speedy rotations when adjusting setting requiring rapid-movement such as LiveZ, or using the control knob to move the extruder position.  I run these knobs on all of my printers, and i genuinely prefer them over the OEM knob. 

If you like/use this knob PLEASE post your "make" I love to see it in use :)

Some Highlights:

• It has been strategically designed so the finger-loop does not protrude far enough vertically (up) to make contact with the build plate in the maximum forward position.
• The knob's loop is strategically oriented so in the 100% DOWN position you can stick your finger through the finger-loop to press the X button if you need to cancel a print/reboot.
• The knob's finger-loop is strategically oriented so it does not cover the printer speaker if in the 100% UP position
• Fun Fact - “The Best of Both Worlds” is the Star Trek TNG episode where Picard is assimilated into Locutus.

Printing:

• Prints with with no supports and a good knurled texture with a .4mm nozzle @ .20mm quality in ~30 minutes.
• I have included a .3mf file to illustrate the proper printing orientation.

Bonus! If you like this model, please check out my other models below:

• Printable 6-Card Wallet
• Prusa Right or Left Side Tool Tray Upgrade (seen in photos) 

Credit: to “VAL” for the knurled texture on this knob.  Heavily modified internals for structural stability, lift from base-plane  & ease of printing / added speed-loop for the “best of both worlds”.