So Pfhoenix has this fantastic gear planner program over at this thread - I highly recommend it!

In-game, we already get some feedback when equipping and unequipping gear with warnings about duplications that don't stack. it is very unwieldy and not user friendly at all. I propose a new tab under Bio on the character sheet; or add it to the "+" tab, where one can have a permanent view on this as in the planner mentioned above. (Just scroll down in the first post of the above mentioned thread to see what it looks like in there)

Thanks!