hello, I need to make a new Pcb with a QFP that has a 0.5 millimeter pin spacing. (a little under 20 mil) The current PCB has a minimum grid of 5 mil, wich is not good enough for that chip, since each side has 50+ pins and the error adds up fast. Has anybody here been doing that kind of design, or know how to make Pcb do metrics ? Thanks, Chris.