Grocery Cart Tablet Holder Mk4

This is one of my most talked-about designs, particularly in supermarkets where people are always asking where they can buy one. It slips onto the top of a grocery cart and holds my iPad (would work for other tablets too) so my shopping list is easily to hand while shopping.

The Mk4 design attempts to make it sturdier and better able to fit more carts. I've lengthened the vertical so it better supports a tablet, moved the 'legs' down a little, and turned them to a sharper angle, so on carts w