// configuration values
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								l   = 27;  // distance between ground and inner clip
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								h   = 7;   // height of clip
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								t   = 5;   // thickness of clip
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								w   = 90;  // width of ground plate
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								fs  = 8;   // font size
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								// internal variables, not change these
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								in  = 35 / 2;
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								out = in + t;
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								d   = l + in;
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								content = "TM";
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								font = "Droid Sans Mono Bold";
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								difference() {
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								  union() {
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								    difference() {
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								      difference() {
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								        cylinder(r1=out, r2=out, h=h, $fn=50);
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								        cylinder(r1=in, r2=in, h=h, $fn=50);
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								      }
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								      translate([0,33,0]) cylinder(r1=25, r2=25, h=h);
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								    }
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								    translate([-w/2,-d,0]) {
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								      cube(size = [w,7,h+5]);
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								    }
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								    difference() {
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								      translate([-fs,-d+7,0]) cube(size=[fs*2,d-7-in+2,h]);
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								      translate([0,1,0]) cylinder(r=out, h=h);
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								    }
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								    rotate([0,0,90]) {
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								      translate ([-d+9,-fs/2,h]) {
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								        linear_extrude(height=1.5) {
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								          text(content, font=font, size=fs);
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								        }
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								      }
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								    }
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								  }
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								  translate([-(w/2-6),-d+7,(h+5)/2]) rotate([90]) cylinder(h=3, r1=3.5, r2=0, $fn=20);
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								  translate([w/2-6,-d+7,(h+5)/2])  rotate([90]) cylinder(h=3, r1=3.5, r2=0, $fn=20);
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								}
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