I came across this recent forum post reply that caught my eye.
Stunning info!!!!! This made eminent sense to me. After all the time and anguish it took to get to my working solution through forums and wiki.
But, how does the casual joe hear about these changes, because frankly I can't find anything on the forum or wiki about this New Device Option in Firewall Config
I went ahead and followed what I figured needed changed from the post content and I removed from my firewall VPN config:
config zone option network 'vpn0' option output 'ACCEPT' option name 'vpn0' option input 'REJECT' option forward 'REJECT' option masq '1' option mtu_fix '1' config forwarding option src 'lan' option dest 'vpn0'`
and then added the mentioned
list device vpn0
Under the WAN ZONE section
Low and behold, after restarting Network/Firewall/OpenVPN/Vpn-Poilicy-Routing, it does just what my mind said it should do - WORKED AS EXPECTED.
So, the question is: Where/How do I/We find out about this stuff!!!!!!!!