Good video, about to order some of these. Handy to see the sprues as I wanted to see if there were plumed heads to spare which could be used on the Russian Ulhans set to make Polish lancers. Looks like there are plenty to go around.
I'm probably not the best person to ask, I collect rather than play, but for basing them it will depend on which rules you would be playing, basing usually either 4 or 6 figures to a base, and skirmish figures are based singular, somebody who plays more than me , please correct me if I'm wrong
The building/painting guide that comes with the set will help you, but what you'll find is the backpacks will have slight differences for grenadiers and fusiliers and voltiguers. EDIT-- There is an image on the painting guide shows what backpacks for which figures, also which heads too
