Parametric Desk/Wire Hole Grommet/Insert (OpenSCAD)

As it says, I needed an easy cable pass through for a table, and this is what came of it. 

Simple gravity(or friction) fit, and a press on top cap. Slotted sides to go over wires, assemble with rthe slots offset to have a closed center hole.  Glue at your discretion. 

Parametric for anything I thought it needed; Lengths, inside and outside diameters, clearance cap to body, hole and slot sizes, etc. 

PLEASE NOTE The BOSL2 Library IS REQUIRED to run this in OpenSCAD!
https://github.com/BelfrySCAD/BOSL2

 Standard dimensions in the script, are what made the included STLs, the size I needed;

//the center hole diameter
WireHole=22;

//Inner diameter of the tube
TubeID=33.8;

//Outer diameter of the tube
TubeOD=37;

//Outer diameter of the top flange
FlangeOD=49;

//Sits on top of table/surface
FlangeThickness=3;

//Below Flange, through table in theory.
TubeHeight=30;
//Thickness of the top cap flat
TopThickness=1.2;

//wall/lip width around the cap
Wall=0.8;

//width of the wire slot out the side
WireSlotW=12;

//Print clearance between cap lip and flange
PC=0.2;