The Z-Axis Knob you have been looking for. Simple, stylish, ergonomic. ;-)
Enjoy...
Like it? Here is the full set of knurled knobs for the Ender on Thingiverse:
E x t r u d e r K n o b | Z - A x i s K n o b | C o n t r o l K n o b |
 |  |  |
| Z-Axis_Knob.stl | 506.7KB |
