MultiWii

So I've seen there are two differnt multiwii boards v2.5 se, one has the A3, A6 and A7 pins, and the other they are removed. Are these pins able to be added into the one that dose not have them and be supported? I read somewhere that they where analog pins only? What uses could I get from these pins?

sure if you added them you could use them, for things like measuring things or output things, the gerneral arduino sort of thing