Need box assistance

[Schudelm86]

I have four RF P3D2-12s on a RF T1500-bdcp. I have two shitty boxes right now stacked. I have horrible leaks in the one and it's separating and knocking horrible. I threw a few extra screws in and its quited it down a bit but in addition to the poor quality old used boxes that I'm using, they have different dimensions and port sizes. The lows don't hit very well. I really only get great sq and spl over 42 Hz. I like low bass. I was wondering if someone would be able to draw me up some plans for a box. I have a crew cab Silverado and I removed the double seat. I have roughly 35" x35" x22". I have my boxes stacked up above the window currently and don't like blocking my vision. If needed the 22" can be extended into window view but would rather not. I'm not super familiar with building boxes but I love wood working and metal fabricating so I know I have plenty of tools and experience to build. Here are links to photos. Thanks in advance for your time. Also, I have seen Joes prior box design for I believe the first or 2nd gen P3, either way it's not the version I have and I'm not sure if just building two of those boxes and then fastening a larger peice of MDF on top and some extra screws to fasten them together would be sufficient or if a larger shared chamber with single port would sound better. Experts, I turn to you.

http://imgur.com/K2RyC6M

http://imgur.com/cYKwvKM

http://imgur.com/WM6D6uA

http://imgur.com/ZUsrbDa

[bassfreak85]

i assume you want more lowend? l what are the exact model numbers of the woofers?

[bassfreak85]

http://www.rockfordfosgate.com/products/details/p3d2-12

i'm going to say that's the woofers you have?

[Schudelm86]

Yes to both questions, except that is the 3rd generation and newest model. I believe I have the 2nd gen. IIRC 3rd gen uses the "t" series baskets. Not sure if the specs are exactly the same regarding required volumes and such. I do know 2nd gen is 500watt rms and 3rd gen is 600 watt RMS. So something is different with the drivers.