Ok so.. I get the idea of not feeding them anything bigger than the space between their eyes and this question may make me seem dense but I am well prepared for that which space are we talking? The indentation? The actual space from eye to eye? I want move Cross to crickets from our local pet shop because they are cheaper and already gutloaded but I want to make sure it's safe. So what size is the correct size for him? I am including a pic in hopes that someone can clear it up for me... Any advice on size would be appreciated