Thanks to ufolev for meeting online recently with the intention of playing a few test rounds with me. But, due to me also recently switching ISPs and getting a new router - neither Kali or DC99's TCP/IP program seem to like it. Kali turns up a bunch of NAT port conflict error messages which I have no idea of fixing and even with my Windows and router firewalls turned off (to much disgust) the TCP/IP method didn't work for me either. We each tried both hosting and joining, but nothing.
So, with regret, even though it was my idea to get back together online again, I'll have to say "I'm out."