I had a few questions on the US Blanks. Is the outline already cut-out or does it come as a rectangular piece of foam/EPS

US Blanks have a general surfboard rocker and outline. You will need to cut an outline with all blanks that we sell.  When selecting a US Blank you should try to find a blank that fits the dimensions of the board you are trying to shape.  US blanks are a close tolerance blank which mean that the outer part of the blank is the strongest foam and as you get closer to the center the foam will get softer, which makes blank selection critical to the strength of your surfboard.