I've got to drill over a 1000 holes thru 1/2" 304 stainless. This will be done in a machining center with flood coolant (unfortunately not coolant thru spindle). I've always just purchased whatever 1/2" carbide drill was cheapest. I can afford to spend a little money on tooling for this one. I'll be doing more of it in the future. Recommendations on a drill?? Replaceable tip drill?? What would you use?