I'm hanging a sign, approx. 4' x 4', and am uneasy about failure due to wind(its a windy area). I'm leaning towards eye screws in 3/4" MDO, or eye screws in dowels and then inserted with epoxy in HDU(to keep the weight down). I Would like advice on the safest route for such a large sign(the client may want me to go even larger). Thanx.