Individual pieces could be a bit of a problem though.
when you got individual pieces of armors, there are many combinations, that means many visual gliches (like parts of the hand armor piece going \'inside\' the breast armor piece while walking).
It will also mean a bit more complicated armor rules.
Besides that, wearing a few totally diffrent armor pieces could look really awkward...
So how about this:
There will be armors of diffrent metals kinds, each with diffrent types of armor for every armor.
All the pieces of your armor are allowed to be of any type and class, but must be of the same metal type.
E.g. You can wear a bronze (metal) heavy (class) Uber Armplates of Doom +3 (type), and a bronze (metal) light (class) Stealthy Legplates of Stealthiness +2 (type) even though they\'re of diffrent classes and types because it\'s the same metal.
You can\'t, however, wear iron heavy Uber Armplates of Doom +3 and steel heavy Uber Armplates of Doom +3 even though it\'s the same class and type, because the metal is diffrent.
This way you can wear many diffrent kinds of armor in diffrent shapes and rules, but they\'ll fit eachother in color.