Summary Very usefull especially if you use your phone for navigation. As you have a chance to change its position very easily, you can put it a position that let you see it while driving. Use M3x10 or M2 screws to mount back support. Print Settings Printer: Tevo Black Widow Rafts: No Supports: No Resolution: 200 Infill: 40 Notes: Doesnt matter how much infill did you use. If you print it in right position, support doesnt required.