My home city is working on a T5 Workshop…we have a T2 Forge/Arcane etc. This is crappy since all my mats are in one place. No, crafting in another city is not an option because the way storages are linked is punishingly stupid.
EDIT: What I am saying is that if you want to build a T4 crafting station, all the others should have to be T3 first.