The devices connected to the pcWRT subnet will reach to the Internet in two hops: device -> pcWRT -> main router.
If you have an IP printer connected to the main router, it can be reached by devices on the pcWRT subnet by IP address, for example, 192.168.1.101. However, if you blocked “literal IP address” in the profile, the printer cannot be reached because it’s by IP address. You can either turn off “Block literal IP address” or add a Host name in the System Settings (add a line after the “127.0.0.1 localhost” entry, for example, “192.168.1.101 printer”).