part of inner pad

rombos.scad

module one-romb() {
scale ([1, 0.7, 1]) rotate ([45, 0, 0]) cube([30, 1, 1], center=true);
}
//lad-rombs.scad
module lad-rombs() {
for(i= [1 : 30]){
union(){translate ([0, i - (i * 0.3), 0]) one-romb();}
   }
   
}

module tu-rombs(){
	union(){
	translate([10, 5 , 0]) rotate([0, 0, 70]) lad-rombs();
	lad-rombs();
	}
}
//tu-rombs(); on z-axis [-0.7 0.7]

difference(){
		linear_extrude(height=2) {
		hull () {
			translate ([0, 5, 0]) circle (5.5, center=true);
			square ([11, 10], center=true);
	    }  
	}
          translate([10, -3, 2]) rotate ([0, 0, 55]) tu-rombs();
	}

//on z-axis [0 0.9]
linear_extrude(height=0.9) {
	hull () {
        translate ([0, 4.88, 0]) circle ( 6.12, center=true);
        square ([ 12.24, 11 ], center=true);
   }
   }