[Grumpy Gaz]

Here's a thought : If you had a non-running car, and repaired it with over the counter parts (by necessity these may have to different from the car manufacturer) We are just talking, wheels,tyres, axles etc. Not motors! .... Would this constitute a "modified car"...?

 

[Grumpy Gaz]

I think that for "Stock" the cars should be de-magnetised but otherwise unaltered. For "Pro" then limited modifications should permitted, on the pre visor that only threaded tyres are permitted. There are too many "No holes barred" categories in slot racing.
I do agree about GT cars: The Porsche 911(including 934/935 variants) is an iconic rally car!

 

[Grumpy Gaz]

Very true, Daniel Ickx, in the name of fair play rules & regulations, and by association scrutineering have become necessary evils.