Migration from pfSense to OPNsense. Best practice

[iamspartacus]

Can someone point me to a current resource for the best practices for migrating a long running pfsense config with lots of customization into OPNsense on the same hardware?

[EdwinKM]

I think a couple of options:
* backup the config. It is XML so fairly readable
* Make screenshots of changed settings you remember
* Create a pfsense VM restore the mentioned backup so you can easily compare