Hello, received the PCBs made from the schematics I got help on in this thread. Sincere thanks for all of the help and advice.
Everything is working as expected. Of course there will be modifications made, such as making the multiplexer(MUX) board smaller. This was a lot of fun, and what a beautiful thing to receive such help and guidance in the process!
If anyone has any thoughts or questions, or would like me to share the schematics I have please let me know. (I know there can be improvements, etc., but if anyone would like to use these schematics as a starting point for their own projects, let me know.)
tonyAm