Lightweight bracket (v4)

I found this a little corroded remnant , it took just a brushed and painted and returned like new. But it was of cast iron, a little heavy, then I did it again in Titanium. Last minute bracket: Weight 389 grams, -81% This model was born to be reliable fairly light but with max loads about 500 MPa, so I had to fill with holes at the expense of aesthetics http://grabcad.com/library/lightweight-bracket-v2-1 http://grabcad.com/library/lightweight-bracket-1