Hi Bob, maybe the carpal tunnel pain is masked some what from the pain meds you take for PN, my C/Tunnel problem happened before the PN even started, at that time my doc prescribed me tramadol which did help some, but still had pain especially aggravated by using drills or electric sanding, any electric tool that vibrated use to always worsen the pain.
At night i always put a splint on my wrist to keep my hand as straight as possible, it did help to get a good sleep otherwise the pain would wake me up all the time.

Brian