What are people's opinions on Pneumatic Drivers? We are still using a manual Fletcher driver. A couple of the women that work for us have had carpal tunnel and feel it comes from the driver. Additionally, when shipping our frames we've seen a number of cases where the "points" are coming loose. I have often wondered about the pneumatic drivers. Are they worth the cost? How do you physically have them set up? Is the air connected from above or just a hose on the ground? Would love to hear feedback on advantages/disadvantages, or anything else I'm not thinking of? You guys have been great, thanks for the feedback!!