They never have depth adjustments, at least Senco or Bosch. The depth is usually controlled by air pressure. I forgot to ask him if he put any gun oil in it then try it with the pressure reduced. They really act up when they get dry.
I've been using the Senco and Dewalt battery units for the last few years. Those have a depth adjustment. I have to check the Bostich pnuematics, but I think you're right, pressure equals depth.
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."
B. Franklin 1759
Yeah I guess u're right about the kidding. The wood I was using at the time was 1/2 inch pine grooved plywood. It doesn't matter what wood I use whether its base board or pine. I took it apart and didn't see anything that could be fixed or replaced. So I'll just use it for thick wood.