I recently installed handlebar risers on my GSPD and I need to cut a small piece out of my windscreen so that on a hard left turn the master cylinder will not come into contact with the windscreen. Prior to installation of new risers, the master cylinder fit under a scallop in the windscreen. Any advice out there on how to best cut the windscreen which is a stock BMW item. Jig saw, coping saw, number of teeth on blade per inch, grit of sandpaper to finish it off, etc.? Any comments, constructive or otherwise, would be most appreciated.