After seeing a lot of different Pokemon Go Aimer 3D models show up around the internet I wanted to take my shot at it.
My goal was to make one model that should work with as many devices as possible. That meant not trying to make it wrap around the phone, and be small enough to fit more devices.
Making it fit is the easy part, but getting it to stay so it's easier to use, and even use one handed, is harder. My design went through 5, arguably 6, iterations. The end result includes indents in the bottom section to produce the following intentions:
1. Home/back/menu buttons shouldn't be hit accidentally
2. Enough room to stick a tiny bit of sticky tack so the part will stay on the phone. I used this: http://smile.amazon.com/dp/B001F57ZPW
Overall I'm quite happy with it. It's simple but very functional. It also accidentally ended up having a Mass Effect Mass Relay look which I like.
I've included the Mk5-T model as well, which includes a thinner (hense the T) lower bracket so it will work with phones with thinner lower bezels.
Printed in PLA, infill 15%
Infill could go higher so it'll be more ridgid. I printed my Mk.3 design at 40% infill and it was noticibly more ridgid and wasn't significantly wasteful on plastic or print time.