1992 - 1996 Dodge Viper GPS Mount

This was the least-terrible idea I could come up with. Reasons why I decided on this location:

1) I didn't like the cigar lighter mounts because the GPS is too low. Also if you knocked it with your hand you would probably damage the cigar lighter port.
2) With the windshield angle, there's not enough space to put one on the dash.
3) Mounting it to the rear-view mirror could work, but the GPS would obstruct the view quite a bit

Required hardware:
M3 bolts. 8-12mm in length
M3 brass threaded inserts or M3 nuts. 4mm deep is ideal.
200mm long zap straps (zip ties).

I used  threaded inserts inserted into the backing plate. You could just use M3 nuts instead. It's a two piece design for easy printing, and it's easier to just print a new ball mount if the old one wears out. There is a top and bottom to the mount plate. It has a lift on the bottom to prevent the vent from sagging downwards. 

I managed to get my zip ties in without removing the vent. There's two horizontal bars on the back of the vent grill. Open the vent (the vertical louvers) then wrap the zip ties around these horizontal bars. It is a bit tricky. You have to curl the zip ties just right and have tweezers handy. Alternatively, it is possible to remove the vent grill without removing the dash. Your mileage may vary in that regard and you risk breaking some plastic….

Notable print settings:
Print the mount plate with support touching build plate
Printed in ABS

Created in OnShape:
https://cad.onshape.com/documents/2d43d4ac406cc39c876446d1/w/9956f30aedb95e7eb080c43a/e/e9d8f12b8db2072cad644549