Working on Hopper Basket Print

The model is coming along slowly.
$fn = 100;

wallThickness = 3;
hopperHeight = 70;
hopperWidth = 70;
hopperThickness = 70;

holesX = 5;  // number of holes in the x direction
holesY = 2;  // number of holes in the y direction
holeRadius = 2;
holeSpacingX = 5;
holeSpacingY = 5;

p1 = [0, hopperHeight];
p2 = [2*hopperWidth, hopperHeight];
p3 = [2*hopperWidth, 0];
p4 = [hopperWidth, 0];

hopperDiagonalLength = sqrt(hopperHeight * hopperHeight + hopperWidth * hopperWidth);
arrayWidthX = (holeSpacingX - 1)*holesX/2;
arrayWidthY = (holeSpacingY - holeRadius)*holesY/2;

difference(){
    rotate([90, 0, 0])
    difference(){
        // create the side of the hopper and extrude it
        linear_extrude(hopperThickness, center = true) polygon([p1, p2, p3, p4]);
        // create the side again, extrude it, then move it, then cut it away from the hopper
        translate([wallThickness, wallThickness, 0]) linear_extrude(hopperThickness-2*wallThickness, center = true) polygon([p1, p2, p3, p4]);
    }
    // cut away cylindrical array
    translate([hopperHeight/4, 0, hopperWidth*3/4]) rotate([0, 45, 0]) translate([-arrayWidthX, -arrayWidthY, 0]) cylindricalArray();
}

module cylindricalArray(){
    for(i = [0: holesX-1]){
        for(j = [0: holesY-1]){
            translate([i*holeSpacingX, j*holeSpacingY, 0]) cylinder(wallThickness*4, holeRadius, holeRadius, center = true);
        }
    }
}