I am a long time collector of classic video games but i am new to the neo geo. Based on what i have seen and read i have decided to buy an aes but now i am hearing alot about mods. I want to make sure that i get the most for my money. Can someone explain to me what a unibios upggrade is for. the console that i am looking at has version 2.1 and i am wondering if this will allow me to play MVS carts without an adaptor as well as what kind of problems i will run into