Evo7,
Just a matter of doing it easy on the basis that doing it hard makes life less pleasant.
The decals on the instruments are designed for the instrument to be used according to the "standard" way of doing the things one does .. if the user chooses to do it the "other" way then he/she runs a much higher risk of making careless or unfortunate mistakes ... especially if the instrument is not used day in day out
For the cases I listed above, it doesn't matter .. you get the correct answer ... but why do it hard ?
Matter of risk assessment and personal choice in my view ...