a lil to late, started my build yesterday i got the tuning of the ports it was 38hz and i has almost the box donee and started to screw the ports onto the hole on the side wall then it just split the whole side so i said F*** it and i didnt wanna do a complete redo i just put a new side on and then went to the re site to do a slot port and got that all done up but i still messed it up i put the port flush with the bottom and top so i cant put the front on i have to cut the front smaller and attach the front wall to the port wall be the port hole FML. i dont even care as long as it works for a week and outta my back seat. next weekend im gonna look into a mach 5 ixl