Hey guys, sorry if this has been asked already... anyone know if I should be setting individual training for the players while using the training schedules + additional focus of Quickness?

I'm talking about the position/role/duty section. If so, which roles are best to use, or just set them to the roles matching my tactic that they would play in? Or leave them as default for best results.

Also any changes I should be making to the Units, moving any type of players to other units?

Cheers.