Thank you so much for your help. I had the wrong firmware. changing that has the camera now working and I don't need to get a new one (though having looked at spec it is tempting still!)
The internet has lots of annoying icons over it like 'pin it', 'tweet it'. It needs a 'send this person some beer' system. If it had one, I'd be having a good few clicks on your icon.
If anyone else has the same problem, these are the steps put together, that got it all working:
- In KStars, EKOS, Camera -> Controls, set the format to Raw 8 Bit and turn streaming on
- Monochrome with 'graph paper' overlay?
- Under FireCapture, enable colour with the Debayer function.
- In oaCapture settings:
- Camera: force frame formet to RGGB8
- Demosaic: Demosaic preview and output data, set Bayer format to auto or RGGB8
- You may have to reset the camera or disconnect - connect.