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I can answer questions 7 - well sort of.
Well most ramgharia's work involves manufacturing, during British rule they got sent around the world to work in countries like Kenya. You've seen kenyan singhs - u no like Jassi Sidhu, their roots have been twisted and evolved. I think starchy paags are also more suitable for hot weather as they are like hats ( no i dont approve) so they can just take them off.
Something i must point out though, many amritdaris have been born from these people who call them selves "Ramgaria Sikhs", who said that they believe in Baba Bishkarma, or dont do Gatka, or wear bana or really do the rest of the things you listed? Don't forget that amritdaris are do denounce all form of caste, and if "ramgharia" people call emselves sikhs then im afraid that they are wrong.
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