OK,
I think I got it! Through setting my outbound advanced NAT mappings for each interface with a rule of source any, * * *, etc.. and enabling the filtering bridge in the advanced setup, it all worked! Granted, traffic seems to be flowing through my LAN interface rather than WAN, but I can sort that out later (this is on a test network with a software router on my mac so… ;) ). So thanks!!!
NickZ
P.S. I've attached a screen-shot of my routes-table here.
[image: routes.png]
[image: routes.png_thumb]