question about koolance cases

[Crescent13]

I am working on designing (and hopefully buying) a gaming computer. I am going to go with a koolance case for the liquid cooling, and they have two models, PC2 and PC3, and I want to have two hard drives in it. When I go to the specs for the second hard drive kit, it says it is "only compatible in Koolance PC2 Cases". I think this was said before the PC3 case came out, so I don't know if it is old information, or if it will really only work in PC2 cases.