that picture was just a machup, this box has to built in the car, ever piece cut and fit, from that picture it still had to completly come out of the car so the 2 6" aero ports to be cut thru rear deck, as of now it is done, yes all corners are reinforece with 2x2, siliconed and installed, as to the jagged edge, well it a compound miter cut and had to be timmed to fit that double baffled panel, it was cleaned up nice and striaght, i still have to do cosmetics (fleece, glass, and carpet) and build floating amp rack for the 2 3k mono amps. i have 14 hours in rewiring this 30 speaker install, carputer, radio, 8 cross overs, 2 4 channel amps, head unit, lcd screen in dash, then the time it took to fit 2 6" aero ports, their opening size is 9", box fit, installed glued, screwed, siliconed, customer needed the car for a trip, will be back in 2 weeks to finish, at least he had mids.highs playing. CANDYPANTS when you have a build equal to this please post your inprogress pictures