Couldn’t find how to split the model in Cura, made two more and changed the Z on each to reflect the “two” parts and printed. Took a black Posca marker and colored what I wanted and AC superglued them togeter.
Also, I had to sand it like most of my parts as my first layer line is a little smooshed for adhesion, but it worked out fine.
Still want to see a model where we can print a inner sleeve of clear plastic to send a light through and pressfit all the parts :D