Iphone hook for airplanes

When I watch movies on planes I end up holding the phone for 2 hours or having the tray-table down and using the Mini stand for iPhone & iPod Touch by MakiYoshida (http://www.thingiverse.com/thing:2205). There are worse fates, but having the tray table up gives me more freedom of movement for my long legs. I wanted an iPhone hook for the tray table in the up position, so I designed and built this.

It clips over the tray table when up, and props the screen up when placed on the tray table so