it is cut near Mexico's coast (which allowed me also to make the map bigger)
I don't see how moving one piece of the map to an other place can allow you to make it bigger. Cutting a rectangle in two squares and switching them doesn't change the dimensions of the whole shape.
And cutting off at Mexico means Alaska will be at the east side as well, won't it? Americans will really hate you for this map, first stretching out the US and then taking it apart :P
(just kidding)