Cardock for various phones

This is a carholder I made for my HTC One X+ but I think it's universal and with little modification to the size it can fit several phones (This printed model is to little for the LG G3).

I've uploaded it to show the idea behind it, it is extremely simpel and cheap to make so I hope it might inspire others.

I do sugest putting a piece of tape on top of the cylinders which tie the elastics so that you are sure that the elastics don't slip of while driving.
As you can see I've glued a clot