Have you guys tried to install CheckPoint Gina OS on the SOPHOS SG210 Appliance?
We just create R81.2 ISO USB and boot to on SOPHOS SG210.
After installing the CheckPoint as an open Server on the SOPHOS, everything is just working well and the speed test result is even good with the Threat prevention feature.
~1GB throughput is reached.
If you guys have some expired UTM9 and get stuck on the license page after login, you might try this out and reuse the Firewall as a software Router / Firewall.