Ok, just finished first rount of testing after fixing the side panel.
The statement, "Tuba is going to be the last subwoofer you are going to own" is 100% true. I don't know anything powerful than this. I totally agree with Sajith's impression on his Tuba. The whole house was shaking eventhough it is kept outside the room. This is the ultimate sub woofer one can have.
Have some more painting to be done. After that more testing and make a cover for the driver access slot. Found not much diffrence with the cover and without the cover. So an acrylic panel with some LED's will be nice.