@dalehileman,
No, I mean there are brands of cars with special electronic pressure sensors in them, new trainees do not realise they must know brands that have them. Plus if one only comes in to the workshop floor every few months, it is easy to treat (in fluid daily normalcy) the car the same as the rest.. Not every guy in a tire fitting place cares what car is what, we are not all XR3i fanatics with top gear every night, just because we have a job or career in tires.
Generally speaking a tire fitters knowledge need only extend to rims, batteries, oil and tires. Many do wish to know every new thing, but many go home and try not to remember work, and do not remember 150 different car makes/model plus monthly additions. Cheeky you think? or is it cheeky they do not stamp a couple of letters near the valve?. It is a pain in the proverbial when a new fitter hoys one off and we gotta pay for another... It is not the managers fault if he is busy.
If you get my point, tire fitting is tire fitting, yes we learn about most other car basic functions and the repairs therein, but it is getting electronic now, the shop floors will be full of people who can only change oil at best.
Breaking off a £20 to £50 component is a matter of course on the bead breakers for cars (the other bead breakers I referred to were the wagon and tractor ones).
RE: the age sex etc... Nah, I dislike people, I am here to put some answers in the world, not make friends.
I am told people kind of pull some strange face, that mentioning changes in direct fashion is displeasing, I have learned it is fruitless to ask them why.