I needed a good way to see my Navigon app while driving. The mounts I had purchased did not work well with my iPhone5 because of it's longer size. I made a "holder" for the iPhone5 in an Otter Box case and then made a surface to mount it to ("bracket") that slides into the gap below my stereo system. I figure most people probably can't place it in the same place I did, so I provided the "holder" separately they might be able to devise their own bracket to attach it to. I used 3 M3-0.5x18 Bolts. I've provided the sketchup files so you can alter the design to suit your needs.You can print it out as one whole piece or you can print the holder separately from the bracket. Printed the holder with ABS as 100% infill and no shells. Printed the bracket wtih ABS as %40% infill and 3 shells. Used 3 M3-0.5x18 Bolts to attach the "holder" to the "bracket" Also tested the single part version printed with PLA, 100% infill, 0 shells.