Depth adjustment won't adjust your pressure.I am going to get a few pieces of glass to practice with from work so I can get practice. The drill press has a depth adjustment so I'm going to play around with and and see if I can find a way to use it to adjust the pressure on the bit.
It can be done with a drill press, but you just have to be very careful as to how much pressure you put on it, due to the added leverage that a drill press offers. Be especially careful as you near completion of the hole. My advice is to NOT press any at all, and let the weight of the drill do the work....maybe use about a pinky finger on the lever, but when you get near the full depth, back off pressure or you will get chips come out on the inside edge of the hole.

