*** This thing is obsolete. Check out the newer version at http://www.thingiverse.com/thing:24734 ***
Super tight, rock solid bumper for IPhone. No wobbling, shaking, cracking whatsoever.
Over 40 trials to bring you the perfect product!
Check out my blog at
minifacture.wordpress.com
Supplied G-code is with these settings:
Layer 0.15mm
Temp 208'C
Feed 60mm/s
Traveling speed 400mm/s
Machine center 80 * 130
Nozzle size 0.4mm
Filament 2.89mm dia
Fill 100%

*** This thing is obsolete. Check out the newer version at http://www.thingiverse.com/thing:24734 ***
Print with PLA. You can use supplied G-code or make some adjust if you wish.
READ INSTRUCTIONS BEFORE USING
WARNING : There is almost no space between the phone and the bumper and requires some force to fit so be careful not to break anything such as power button, vibrate switch, your finger or IPhone.
Print with fill greater than 80%, I've done with 100%. Otherwise horizontal layers won't stick in thinner parts.
Now the important part - refer to the pictures if unclear:

1. Lay down the bumper and IPhone with the back panel up and volume/vibrate buttons facing away from you.
2. Bottom left corner of the bumper (after step 1, bottom left corner is now on the right and facing towards you) has reduced overhang. Now lay the bumper down and fit your IPhone from up(as in from the air). Fit and align 3 other corners very tight.
3. Slowly push in the bottom left corner until it's in place. You should hear a "click" sound. Make sure other 3 corners are still in place. Check the screen side(front) as well.
4. If it doesn't make its way easy then tap it with your hand gently but firmly. It may require some force to push in. Once it's in, it should feel rock solid.
5. To take it off, hold your IPhone and push the bottom left corner from the back to the front, with both thumb until it pops out. Once it's been in and out, it should be easier to fit.
   Still confused? Watch this video how I did it.
   http://youtu.be/KZPcZmigoQw