[Graham]

Didn't he call the last one the Wimp

That one is still for sale, but a modern “fictional” model perhaps ? Even the version with wide wheel arches is a bit of a liberty and was not a copy of an actual historical racing car at the time I think, but does not look too much out of context, apart from the high profile Thunderslot tyres which on the side view….are a bit too much.

I like the idea of wider wheels, the authentic ones are only 5mm wide, so 8mm sounds tempting

The car was built 7-8 years ago, for the Targa Florio proxy.  I considered mailing it for this proxy early on and in order to meet the 1.5mm ground clearance rule, Thunderslot tires were used on the rear as the car was originally built with a lower clearance.

Yes I did initially set the clearance rule at 1.5mm for all cars, and then changed it to 1.0mm for under 2 litre cars. However your Porsche 911 is a really great alternative.
But seeing your Hillman Imp, has given me the idea to try the 14” wider wheels to see if they will work on my version of the car.