scale( v=[ 0.8, 0.8, 1] ) {
difference() {

scale( v=[0.7,1,1] ) {

difference() {
	cylinder( r=15, h=1.5);
	cylinder( r = 8,h=1.5);

	translate( v=[0,0,0] ) {
		scale( v=[1,1,1] ) {
			rotate( r=[0,0,1],  a=45 ) {
				cube( size=[15,15,1.5] );
			}
		}
	}
}
rotate( r=[0,0,1], a=45 ) {
translate( v=[0,8,0] ) {
cube( size=[35,7,1.5] );
}
}

rotate( r=[0,0,1], a=-45 ) {
translate( v=[-35,8,0] ) {
cube( size=[35,7,1.5] );
}
}
}

translate( v=[-1.5,-12.5,0] ) {
cube(size=[3,3,1.5] );
}
}
}