JDN17 and bwm,
They had to move it forward about 1/3 of an inch so they had to re drill the existing hole to reposition, then they added a new spacer that was 1/3 of an inch wider. Very minor adjustments. There is no rattle because the box is mounted right into the wheel well itself. I will add some pictures within the next week. As for the cost I am not sure, since it was a prototype there was a swap of the use of my H2 for the box. I paid an installer $100 for the installation of the amp and the box. JL audio is one if not the top of the line speakers so I am sure it will not be cheap.
Ang UPS