Blender shader node networks tend to maintain forward compatibility between updates. I keep the shader updated when new major versions release, but if you find any bugs or incompatibilities please let me know and I'll fix them asap.

.STL files import into Blender at a very large scale by default, with 1 mm being equal to one full Blender unit (equivalent to1 meter by default), this can make the texture very small when viewing the surface. To get the correct scale on a large object there is a setting for "Layer Scale" in the shader menu. You could also scale down your object to the size of the default cube. Please note that If your object is very large you may need to manually enter a numerical value in the "Layer Scale" field to exceed the default slider bounds.