This commissioning thing never ends!!
Here's how I mounted my flat panel yesterday (Gerd Neuman's Aurora Flat Panel) after a lot of head scratching.
A Vogel articulated tip/tilt wall mount monitor arm (a small one) - bought at JB HiFi plus a bit of DIY thrown in to attach it to the dome. It allows the panel to be positioned orthogonally and close to the front of the OTA. I can remove the panel and support easily. Just needs a lick of black paint now.