Do you make these for the Mega Cab?

 

I guess maybe you guys havent seen foxacoustics (dot) com. I understand you are lifting the rear seats to 1) allow for more internal Cu In or Cu Ft and 2) make sure the subs dont kiss the bottom of the seats when XMax on the subs are reached. I have a probox which is just like those that you have but because the subs are firing directly into the bottom of the rear seat they are muffled a bit simply because you are firing into acoustic absorbing material. Some of the newer boxes are built just like what you are doing and recess the subs and 'channel' the sound out the front so you actually get more sound. You may want to at least look at this in your designs. It might help you out. I looked at your pics and they do look very good and well made.