.scad

 z_min = 0;
 z_max = 100;
 x_max = 50;
 y_max = 105;
 slice = 1;
 

 n = floor(sqrt((z_max - z_min)/slice)+1);
 for(z = [-z_max:slice:z_min]) {
   i = (z + z_max) / slice;
   x = x_max * (i % n);
   y = y_max * floor(i / n);
   intersection() {
        translate([x,y,z]) cube([x_max, y_max, 1]);
       import("/home/lee/Downloads/2 and 3 repaired.stl");
   };
 };