That's kind of what I was expecting; but do you have any tips? Did you just do it from memory? I was thinking I'll screenshot the major config screens and interface layouts, my BGP configs etc, then work from them.
But also export your config because you will inevitably forget to screenshot a thing or seven and you can poke around the config export for that port number or IP address.
Worst case scenario, you can spin up a VM of pfsense quickly and reimport the config if you have to.
There's going to be a point soon where I have two fiber providers (and thus two WAN links) for a little while, I'll try move the existing pfSense off of my Protectli box to a VM, keep everything up for the family while I configure OPNSense on the Protectli, then if I do it right, I can move everything over with minimal reconfiguration.