Ha ha, yes it has RDC option from the factory
I finally managed to write the ID manually for the one that came with an ID sticker - turns out if previous IDs are cleared first the GS911 can only write new IDs in a set order without throwing errors.
Learning the remaining ID is proving challenging...using the 'deflation wake-up method' the instrument cluster will display the tyre pressure, but the controller will not learn the ID. When the ignition is cycled the pressure is no longer displayed. I have tried several times with no joy, what's frustrating is I can see the temperature and pressure values in the GS911 realtime values display.
When out for a ride, the pressure for the wheel that was manually coded works and the other does not, but there is no longer a warning in the display...odd.
I am not going to persist with trying to learn the ID, I have a thread open on the hex code forum, hopefully the team there will be able to work out what is going on...or perhaps more likely it will remain unsolved.
Now I just need to find someone with a scanner so that I can read the ID and enter it manually...