The A1 mini prints the infill fairly quickly on the provided profile and there is very little contact with the print bed, so it knocks the outer ring loose. So I simply added an outer brim, to make it not come off, which does not affect functionality and is easy to remove.
Otherwise the print does what is advertised and spins without issue.
Thank you very much for your comment and for testing my print, I have just made a slight modification if you are interested in printing it to give your opinion.