Netgear Orbi with Orcon?

I recently switched to Orcon from Bigpipe and I can't get my Orbi working as a router. Currently I've got the Orbi in AP mode connected to the Orcon-supplied router. This works, but I'd prefer to just use the Orbi.

I tried the settings listed on the PBTech page but no joy.

Has anyone got it working?

Thanks.