@CriticalNyte, I have a couple of questions / suggestions for you.
What was the reader / writer?
Do you have a link / photo
Do you have these numbers and process’ to share
From looking at your sabre, do you think the antenna would be modifiable as to allow the weilder to hold it in such a way that it could read an implanted chip in position 0 ( Hand webbing / thenar space ) whereby you could “write different colours” to your implant at will, rather than changing out the kyber crystal.
Also a “jedi security” system, 
Only those with the force ( implant ) could light it up…
( imagine if you had an implant in each webbing with a different colour )
Is it a read once to choose colour on start up? or does it continually read? ( your Field detector or diagnostic card may tell you this )
Anyway, just some thoughts if you decide to do a project write-up