[atlas] Upgrade existing Anchor to newer hardware

Hi, I am working for the Wikimedia Foundation, and we have several Atlas Anchor's deployed at various locations. Some time ago the Anchor we had in our location in Dallas, US (p6093.probes.atlas.ripe.net) failed due to a hardware failure. We are now attempting to replace the Anchor with new hardware which we have installed. The old device was a v2 Anchor (Soekris), however, and the new device is v3 (PC Engines APU.2E2). Given the newer hardware I expect we will need a different USB image to boot from? Our hope would be to re-use the previous IP addressing and other details so that does not need to change. What might be the best way to approach this? Many thanks, Cathal.