not to hijack the thread, but anyone ever try the electric-spark method for pinholes? i read about a guy who hooked up a 9v battery, one lead to a needle and the other to a piece of tin foil, and got them close enough to jump a spark and blow a hole in the foil (the poor man's arc welder). Apparently the holes would come out around .02mm.
seemed cool enough to try, but feel like f7000 might be a bit hard on the reciprocity failure. anyone ever tried this?