Thanks to Greg for this (and all his extremely clear and helpful posts!) and all the others that added to this. Finally got on with ordering all the bits today and looking forward to having a spare in a few days! Now to solve the jack issue...
One question - there was one mention of needing different bolts. Will the OEM wheel bolts on my car work with this setup or do I need something shorter/different?
Objects in mirror are slower than they appear.