I don’t think you’d drop the quill down enough just by removing the depth stop. I think you’d need to remove the hand wheel, pinion and return spring to do that. Even so, to remove the quill completely may require you to remove the head from the column, assuming it’s a bench model? I’ve had mine in bits twice over the years but I really can’t remember the exact process. Do a web search though, pretty sure they’ll be something about it on one of the other forums as it’s a popular machine.