Pcb rework

Does some rework around in the pcb section.
Also moves troubleshooting from pcb to discussion.
Missing period at the end.

In this sentence you propose that debugging is the main reason for the headers, while two sentences ago you introduce it as a backup in case some of the internal wires are wrong/broken. Possible rewrite:

"This allows for manual rerouting of wires should any wire be faulty. But more importantly, it makes it possible to probe the signals, making debugging much easier. " or something like that?