Quoted from InfiniteLives:Go slow and check with the insert frequently.
Made a guide with a marker for the correct depth to check but it's not too hard to manage the pressure on the drill to get it right
That's how I did my whitewood, but for the final I am looking for something more precise/reproduce-able; a really big drill press would be nice, or a radial drill press, or a cnc router or like mentioned I'll probably do a router and some jigs, forstner bits make nice jigs too.