Does anyone here own a set of Prisma markers? Right now, I'm working with 72 which I bought not too long ago and since I have more money now, I would like to complete the colors to 156. I'm quite in a dilemma and contemplating whether or not I should buy the 156 set or if there is a way to acquire and incorporate my current 72 to make 156? I know Copic markers give you the opportunity of mix and matching with sets, not sure if Prisma does too? I just don't want to end up with extras if I don't have to but if no can do.. then I suppose back up is fine. There's just not enough room. :c Also, I'm not big into buying individuals endless its paint.