Here’s the model for the case with PMMA light pipe accessories and the OpenSCAD model.
jp_case_v1.zip (334.5 KB)
Print the test piece “t1” to determine the optimum size in each orientation for your particular fiber (and your particular printer). Then change “vert_hole_size” and “horiz_hole_size” to the values that you found.
vert_hole_size is for holes that are perpendicular to the layer lines of the print.
horiz_hole_size is for holes that are parallel to the layer lines of the print.
Going parallel to the layer lines is preferred because (I think) it is smoother.