IPFire on Watchguard XTM 5

I’m looking at replacing a pfsense install with IPFire on an old Watchguard XTM 5 firewall. Has anyone used IPFire with this device before and had success or run into any specific problems?

My first one is going to be that I need to get a bigger CF card, unless I can remember how I got pfsense onto only the hard drive and do the same here…