Need help from a generous X-45 owner

[Beastb15]

So I'm attempting to build a sub box for my friend's x-45. He's on hiatus for a while and his boat is hours away from me. Can anyone with a spare minute take the measurements of the opening under the seat of the compartment directly behind the driver? I could also use the top to the bottom (the lower ledge, not the bottom of that V-shaped notch).

I would greatly greatly appreciate any help. I want to do some response modeling but have no way of getting the max dimensions of a box that will fit in there. Thanks in advance.

[PieterX45]

Why a sub box? I mounted two Rockford M210's one behind the driver seat facing towards the passenger seat and one under the passenger seat. They are free air woofers and the bass is mind blowing. Sorry about the pics best I have got.

[Beastb15]

Why a sub box? I mounted two Rockford M210's one behind the driver seat facing towards the passenger seat and one under the passenger seat. They are free air woofers and the bass is mind blowing. Sorry about the pics best I have got.

He bought a 12" Exile sub and amp package. 12" sub is too large to mount there, not to mention its not a free-air sub.