Can someone explain to me the acroynim for DID. I think its also refered to a genesis type carto, but aside from the MM guys in Greece I dont see where the name comes from. I have searched a bunch and basically would just like to know why someone would opt for this vs a tank or clearo...theylook very cumbersome to assemble and maintain? If this has been asked many time before I appologize and a link would be appreciated.