So I was at REI and saw a Topeak Ridecase system for an iPhone 6 in the clearance bin and grabbed it. I have an iPhone 7 and figured I could dremel the case and make it work. I purchased it, took it home and the more I looked at it the more I realized I like the mount but hate the case. I then found a mount on Shapeways and purchased it but in the end felt I could do better so I made my own mount adapter..

https://www.shapeways.com/product/7J...shop-inventory