@Mark-G
I'm 1/2 way there.
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The challenging part is only having 4 ports to work with while trying to configure two lagg groups that will use all 4 ports. Also while trying not to lose access to the GUI. So at the end of the day, you have to move the WAN port to a different interface outside your 1st lagg group. Configure it. Then open up your GUI to the WAN, so you can delete the existing LAN interfaces to create your 2nd lagg group. Finally close your GUI up from the WAN.
I keep getting to the part where my LAN lagg is configured, but then the LAN doesn't work. It's probably because I haven't plugged in the 2nd cable yet due to it being on the other side of the house.
If anyone else is trying to do this I'd highly recommend they keep a monitor, keyboard and mouse connected to pfSense, it really helps when you have to blow the config away, which I've done several times, but I've learned alot.