Interesting regarding asking the examiner to check brakes.....
I did my IR first in a seneca before the CPL, and the instructor I had initially always wanted to check her side for the brake function before we taxiied further.
I then changed instructors half way thru my IR and then I asked the new instructor on the 1st flight if he wished to check his brakes and he looked at me as if I was mad......
So I spoke with an examiner about this just to find out what he prefers, and his response was what you do your CPL or your I.R/MEP in is a single pilot ops aeroplane.........on a typical commercial flight in a PA-28 or PA-34 say.....are you really going to turn round and offer your passengers control and ask them to check their brakes???
.......Point taken I thought.
Everyone has their preferences I suppose