I take delivery on my Cross Country in several weeks. I would like to order a Gustafsson flip windshield, which I'll need to drill to mount to the bike. They sell a 1/4" and 3/16" acrylic drill bit for the job. Anyone know the correct size of the mounting screws to help me determine the correct bit to order? I checked the Vic parts site on-line, but it doesn't mention dimensions. Any help would be appreciated.