I also have had problems. I have used this tool for several projects, but the fence broke when backing out the 1/2 inch chisel from oak (I use multiple passes now, going a little deeper each time). And the set screw holding the chisel deforms the chisel so that it is almost impossible to remove from the tight fitting bushing. I have had to use a wrench to remove chisels, and then had to sand/grind the chisel smooth again to reuse. Finally, the cheap plastic grip has worn through. On the other hand, I can't fault the mortises it makes. Delta makes good tools, but I'd try a Jet on this one.