The last job I rand had 22,000 quarter inch holes the next one coming is 32,000 so I've justified adding the drill. I've found a great deal on a Gardner-Denver industrial drive air drill and ordered the board from shopbot to add tool. I'm going to set it up and use the air drill as a dual z type setup. Any advice on the air control valving for the drill. The drill weighs in about 30 lbs. and thoughts on the weight on the gantry? Am I missing anything?