Print Instructions

You can optionally insert a color change in your slicer at layer 14.  (In my picture above, layers 1-13 are the base in blue; layers 14-26 are the letters in yellow.)

Assembly Instructions

You will print the NV part and the base separately and glue them together with a couple drops of superglue.  The NV part has a cutout on the back side so that you can locate and attach the base.

Design Notes

Thanks to @LittleMolloy for designing the base.  The model for the base is here; I also included the file above for your convenience - but that file is not my design.