With new fw version 4.2 we have the option to set Purecab value also locally. How it works is described in 4.2 addendum.
What about situation, when Global PC is set to 8 and one needs to set local PC for specific rig to 3? Looks like it is impossible to do now.
From the manual: The higher of the two values is given priority, and will be applied as the actual intensity of the Pure Cabinet effect.
I would suggest soft-button tick for local setting which overrides the global value - independent of value. This way we will be able to set ANY value as global, with possibility to set ANY value for local.