Hello Pete,
Good to hear you're making progress though I can't ping your station:
$ ping -I tunl0 44.135.51.1
PING 44.135.51.1 (44.135.51.1) from 44.4.10.41 tunl0: 56(84) bytes of data.
^C
--- 44.135.51.1 ping statistics ---
6 packets transmitted, 0 received, 100% packet loss, time 5006ms
but YO2TM's system can!
http://yo2tm.ampr.org/nettools.php?host=44.135.51.1&submit=IPv4+Ping&am…
--David
KI6ZHD