Going from dd-wrt to openwrt should be as simple as a firmware flash from the web gui, and an nvram reset. Worst case, you can flash a "revert to stock" image f

Going from dd-wrt to openwrt should be as simple as a firmware flash from the web gui, and an nvram reset. Worst case, you can flash a "revert to stock" image from ddwrt to go back to factory, then flash openwrt as if the device was factory. Openwrt also has a handy failsafe built into a lot of models. It boots a stripped down http server where you can upload recovery firmware. Used to swear by dd-wrt, now I prefer openwrt.