After seeing the cable channel designed by Chercus I needed the step file to create my own version and I tried to convert the scad file to step, but I had no success.
Therefore I uploaded the STL file into Fusion360 and redraw the contour and extracted that to 120mm. After the first print it was clear that this part is very well designed and fits like a glove on the V-Slots. I attached the STL and the STEP file to this thing for further remixing :)
II am also designing a corner piece to connect horizontal with vertical cable channels over 90 degrees shift. I will add that one also when it's finished.
All credits go to Chercus for this design I only did some contouring to create my own copy