It has been suggested (on Pfsense forum) that I should be able to achieve the wan routing using firewall rules....and once I have re-arranged the layout and added Nic's (and for that matter reached a certain goal) I will play some with it to see what is possible. I will maintain the current router between pfsense and the slower connection as I think that will offer the ability to run that connection during the day too as well as having a fall back connection if the main goes down.