Icon iOS7 tool grid

Hi guys,
I created a simple layout to quickly compare some app icon I'm working on.
You can easily change the content of an icon because all are Smart Object at1024px (simply double clic on the smart object>make your changes>save).
This is very handy, so why not sharing?
I'm using the amazing soft Skala Preview http://bjango.com/mac/skalapreview/ to quickly check the look of my designs.
Cheers!