Is anybody out there using a 2750 over Infinity and IDNet as an ISP ?

I have been using a 2800 with IDNet for years, very happy with both. When it came to upgrading to Fibre I decided to stick with both Draytek and IDNet.

Installation day, BT turned up on time, smooth install. I checked the connection by configuring PPPoE on a laptop direct to the BT Openreach box. No problem. Now to configure the router.

I entered my IDNet credentials, followed the VLAN tag advice in Mikey's guide and got.... nothing.

The 2750 using VDSL profile 17a just cycles between Training->Handshake->Idle. It's been doing it for hours now. I have reconfigured it 4 times now, with a factory reset between tries 3 and 4. Nada.

Is anybody out there using a 2750 with IDNet as an ISP ?