Used the BigBox with the FoxSmart black PLA at 190/70 temps to create this nice-looking useful mount: https://www.thingiverse.com/thing:1466030
Really nice. Gonna have to do that for my Nexus 6P too Just have to design one to fit my receiver. BTW, what app are you using for your car mode?
I also have one to connect to vents if that works better for you, check my Thingiverse Designs page. The app that I use is called Car Home Ultra
Never liked the car vent clips... kinda defeats the purpose of the vent. But I really like the concept of the CD slot mounted one. The only problem I have is that the dial on my receiver will interfere with the holder you've designed so I will have to offset everything to the right some. Hopefully I'll have time this weekend and throw something together in Solidworks.