Has anyone tried to put 8 inch subs on their back dash to replace the factory 6x9s? Looks to me like the grill is big enough and might work w/ minor mod to the rear deck, but I havent had it all apart yet. Also, has anyone replaced the stock tweets in the dash? Ideally, I'd like to have a component set and coaxials in the front and rear powered by my Cadence A4 and some 8s powered by my Cadence digital mono sub amp. I just havent had time to take it all apart to see if its possible.(too much fun driving) Thanks in advance for any help.