Thank you Simon.
The image I posted had the corners cropped out, to remove the light leakage. The corners did have star distortion (elongated stars towards the centre of the image), as expected because I did not use the field flattener.
The current camera is housed in a plastic (3D printed housing) and is very lightweight. The real (aluminium) housing will have a fair bit more weight and also a heatsink. We will see about the tilt then...
I was also re-reading how to set offset/gain because things did not look right and then I realised that I did not do it correctly.
So much to learn... but that is the point
