When I was searching it seemed like I could get nice rounded cable holders, but as STL only files, or parametric options which didn't look the way I wanted. This option was very close, but doesn't allow tweaking of the dimensions.

I used Pyopen's cable holder to help figure out the dimensions.

The code is all new. The OpenSCAD customizer will allow you to set -

• Number of cables
• Diameter of the holder
• Size of the top opening
• Size of the opening at the bottom
• Height of the bottom of the opening

If there is interest I may allow you to control the distance between the cables when you have more than one.

##Edit on 2022-Jan-3 Fixed reported problem for single cable version

2nd Edit

Cleaned up some code and moved to using "hull()" for the overall shape

##Edit on 2022-Jan-4 Didn't realize the highlight on the cutting piece would come through on the customizer, so removed the "#" character.