Just a few minor corrections:
On the Saab, weight and balance is key. The aircraft is nose heavy, hence the F/A may ask those seated in the front half of the aircraft to take a seat more toward the rear. A/BC
side weight and balance is not calculated as the arms are too small to make a difference.
Secondly, the tail stand's only function is to prevent the tail from settling to the ground if a lot of baggage is loaded and customers sit in the rear rows before those sitting the forward rows board. Conceivably, this could cause the tail to strike the ground. Just because the tail stand is on the ground or is difficult to remove does not invalidate the weight and balance calculated for the flight; nor does an aircraft's appearance as "tail heavy" or a large degree of landing gear strut extension necessarily mean anything significant. These are perfectly acceptable conditions, although rare. Keep in mind that once both engines are started and brought out of feather, they produce a forward force further helping the situation.
All that said, with the way people pack and eat these days, the Saab is a de facto 30 passenger plane.