ok I took a picture of the front member, as u can see its warped down the middle is the lowest spot, I shim it w a sample laminated counter top from home depot, I will also putting a 3/4" plywood and 1" pink insulation Styrofoam, can I use the white Styrofoam or pink one is a must? should I shim the whole member or certain spot should be fine? the shim is about 0.045" or 3/64
https://drive.google.com/file/d/0B9d...it?usp=sharing