Looking good man! Sweet setup for sure... I'm thinking about my grow after this one that's about to start up... I know I know I'm crazy and need to just relax, but hear me out. Once I get more funds in a month or so I wanna add in some COBs, but like you said having a little extra color spectrum can def help. What if I took my mars 600 and put it in the middle with 4 cobs surrounding like a box? With a dimmer would it still be too much for a 3x3 ya think?