The only time I use a jeweler's saw when making a Pbox is for the piercings. Otherwise I use a hacksaw for getting rid of most of the brass and then use coarse files. I leave .01 mat'l outside the line and then touch up w/ finer files. If the shape of the sideplates is the same for some length, I super glue them together and use the hacksaw and files to do the common lengths. It seems roughing w/ a hacksaw and then the files is faster than w/ using a jeweler's saw.....anyways for me.....Fred