SnappyChariot

I used these...
https://www.ebay.co.uk/itm/282815234230

Just unscrew the numberplate from the brick and you'll see the mounting bolts underneath. I have a short 5 digit on mine and the screws are nowhere near the edge.
 
You an see it in the B and K:

I have a short plate front and back on mine, both 355x111mm all lines up with standard legal sizing and spacing

I’d happily fork out for a 2nd set of sensors if there was a way I could update the ECU settings at home. I vaguely recall that Carista or Ecutek had a solution in beta. This is going to become a bigger issue as the number of post-14 '86s increase and the desire to fit aftermarket wheels to our cars continues.

Thanks Lucas, order placed!

As an idea this is a comparison of an et40 17x7 (top) and an et35 18x8 (bottom) wheel. The 17x8 et50 would sit around the same in the arch as the 17x7 et40. 

I had 15mm drop on the car when I went for 18" 7.5J ET46 wheels. As the 18s made the car sit a bit higher the 15mm dropped it slightly below stock height. It will be even better if you stay on 17s. 
The car doesn't scrape on any bumps or have issues with driving normally on the streets. Handling is the same or better (it could be better because I moved from Primacy to Pilot Sport 4). 

I've used these guys twice in the last couple of weeks: http://deadening.co.uk/
Cant really fault them or the silent coat stuff, its made a big difference to the car as a whole.
Used the trunk liner kit and it managed to cover the front doors rear quarters and the boot lid with a sheet to spare.

There right now! My 18th visit, not seen any other 86s so far.

There right now! My 18th visit, not seen any other 86s so far.

There right now! My 18th visit, not seen any other 86s so far.

If it helps I've got aftermarket wheels and just swapped the old sensors over to the new wheels and they worked fine