i nearly threw up seeing the concours minors at a rally,with mirrors underneath,i mean what is the point in that?snobbery?oneupmanship?greed?They are Minors for gods sake,use them!
Sounds like you are talking about our chairmans Traveller.
As you seemed to have completely missed the point about concours cars as they are a good yardstick on what things should look like, and to answer your questions as no one else has so far.
The mirrors are to show the finish that can be achieved on the underside with a bit of effort.
Snobbery, certainly not within the MMOC competitions.
Oneupmanship, who with as most compeditors are really competing against their own high standards.
Greed, how does that apply to concours cars

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As a matter of interest the Traveller I mentioned was sprayed by the owner in his garden and it covers around 3,000 miles a year it has been owned since it was 6 months old and has done around 170,000.
Personally for me a concours car requires too much time and effort

but I do think they are great to see what can be achieved because if all our Moggies were the same what a boring lot we would be I like them all whatever the look.