Parametric Keychain

Hello,
For fun, you can easely customize this keychain:
Parameters are (refer to picture also):
// Description parameter
K_Length = 40; // Length of the straight part of the key ring
K_Width = 20; // Width of the keyring
K_Thickness = 4; // Thickness of the keyring
K_Radius = 6; // Front radius (set-up to 0 for a rectuganlar part
K_Hole = 3; // Diameter of the hole for the attachment
K_D_Hole = 2; // Distance of the hole to the edge
K_Rounded = 1.9; // radius for sharp edge
Sketch_Thickness = 2; // thickness of the sketch + for positive and - for engrave
MyFile ="example013.dxf"; // Name of the file, must be in you openscad file folder !!!!! You can easely build you DXF file from inkscape, but it is very important to use only straight curve to get the good import. If you need help, just ask.
Sketch_Scale = 0.25; // Scale of the file
MySketchOffsetX = -10; // Offset in X direction for the shape
MySketchOffsetY = 0; // Offset in Y direction for the shape
MySketchAngle =