@obbardc Well I'm home.. I've got my test harness updated with #Openwrt 25.12.1 and its running (so the scripts etc on openwrt are all looking good - but - oh yeah you actually need to move the zone file to the cloud API right.. Ops. No problem - unless of course you are right in the middle of a #brownout during the #hetznerdnsapi shutdown..
This does actually point to another issue. I'm going to have to move all devices that use same zone file at the same time. (Obvious in retrospect) - Luckily I run a few domains so I can test a bit with one first.