Just for the record, in no way criticising or blaming tarmac for this Been nothing but helpful with the issue! At the end of the day, we both did our research on these wheels, and if anything, it was the rears we thought might have trouble with!
With regards to changing wheels, nah, not happening.
The stretched and spaced wheels are just for show. Not for track, there will be a different set of wheels for those days. Even with the stretch I've still probably got more rubber on the road than stock wheels