Fisheye Lense iPhone Adapter

I bought 3 cheap smartphone lenses (fisheye, 0.67X wide and macro).
http://www.dx.com/p/lx-m301-3-in-1-magnet-absorption-wide-angle-macro-fish-eye-lens-set-for-iphone-samsung-black-275524#.WgL3J2jWy00

They can be attached to the iPhone's camera thanks to the magnet that they have on the base but I didn't like that I had to keep a metal circle glued to my phone all the time.

So I printed FishGee's lens clip and I tried it. I like the design because it works both with thin and thick cases,