Thanks John,
Probably straight from the University of the Bleeding Obvious, but why not just take one of your wheels off and try it in the well?
Space Savers not being to your liking John - hopefully won’t be needed, and when is, will only be for a short time, and is far more practical option to gunge and a compressor.
Might be worthwhile asking yourself :- how many 4 year old Audis fitted with the spacer saver option are on the road, where the spare hasn’t moved out of the well?
Perhaps you could let us know if your full size wheel does fit the well without any adjustments John.
Kind regards,
Gareth.