F5 DNS combine all zones into one top-level zone

Let me try to explain. In our internal DNS setup we have delegated zone xxx.yyy.net towards our F5 DNS. But when we started deploy wideips we did not create zone xxx.yyy.net in the zonerunner configuration. So what now has happened that for every wideip we created a zone <wideip-name>.xxx.yyy.net has been created with A-records for all poolmembers for this wideip.

So we are investigating how we can create the top-level zone xxx.yyy.net in the zone runner configuration an move all A-records in this zone and delete all wideip specfic zones.

But I am also not sure what the best way of working is in this case, should we created a zone for the delegated zone xxx.yyy.net or just let the system create the wideip specific zones?