Customizable antenna wire clamp

I needed a sturdy antenna wire clamp and wasn't happy about the customization possibilities on the existing models, so I made my own.

3 screws, 2 cable guides, 3 nubs to keep the whole thing secured in place.

// customizable parameters, all in mm LENGTH = 36; 
// length of clamp WIDTH = 20; 
// width HEIGHT = 4; 
// height SCREW_DIAMETER = 3.2; 
// screw diameter BASE_REDUCE = 0.85; 
// how narrow the base should be compared to the main size CABLE\_DIAMETER = 2.7; 
// cable diameter $fn = 30; 
// rendering quality, at least 20 for the STL