Customizable table-side cable holder with zip tie anchoring

I wanted a charger cable holder for my nightstand and other places. While it's true there are several to choose from on here, as per Thingiverse tradition, none of them were quite perfectly right for me, but they were still an inspiration:

* [St0nkingByte's 12-slot holder](http://www.thingiverse.com/thing:15137) lacked the customizability I needed
* [ryanidt's single holder](http://www.thingiverse.com/thing:228380) takes up space on the table surface, which is scarce
* [Amirsf's holder](http://www.thingiverse.com/thing:1073434) is designed for a horizontal beam, which I don't have
* [xifle's holder](https://www.thingiverse.com/thing:130495) needs to be pressed flush against a wall to hold the cable in, which mine isn't
* [bitswype's holder](http://www.thingiverse.com/thing:145187) is clever, but requires fairly precise printing to actuate properly, and I didn't want to fight it on my printer.

After looking at the above, I produced this design. It's customizable, mounts flush