I need recommendations on what type of bits are strongest and run truest for drilling 1/16 x 1/64 brass strips with my drill press in bit sizes 78 - 63. Also the rotation speeds. Mine which I think are for wood have suffered under my use and several have broken getting stuck in the soft aluminum base that I made with coffee stirring strips on top sanded down to around 1/32 inch to hold the strip. All recommendations are appreciated. I see MIcroMark has high-speed and titanium bits but don't what to rush out too fast with the wrong cash outflow. Thanks, Rich (PT-2)