Takeda cavalry settlement setup

[tibits]

Is the Legendary bajatsu school '+5 charge bonus for all cavalry units if first to build' only a bonus for cavalry units in produced at that settlement in future? Or all cavalry units produced faction wide in future? Or a one time buff that applies to cavalry units you already have recruited?

If it is only for cavalry units produced at that specific settlement in future then, keeping in mind I must have proving grounds for Takeda fire cavalry, should I go for:

Legendary Bajutsu School + Proving Grounds + Master Armourer
Or
Legendary Bajutsu School + Proving Grounds + Warhorse Studs
(Is there a cap to charge bonus? if so then Proving Grounds + Warhorse Studs gives double gold charge bonus icon so the LBS might not have any extra effect if it is a bonus for units created at the settlement which features it if that settlement already has Proving Grounds + Warhorse Studs)

[tibits]

Also does anyone know if there is a accuracy bonus cap?
Legendary Kyudo School + Hunters Lodge + Master bowmaker
Or
Legendary Kyudo School + Hunters Lodge + Master Armourer

[Destin Faroda]

Is the Legendary bajatsu school '+5 charge bonus for all cavalry units if first to build' only a bonus for cavalry units in produced at that settlement in future? Or all cavalry units produced faction wide in future? Or a one time buff that applies to cavalry units you already have recruited?

As soon as you build this dojo, all units recruited in that province will receive the charge bonus. Already exisiting units won't receive that bonus and can't be retrained to gain it.