Hi, has anyone tried to use an ipad 3/4 keyboard case/stand for the mini as a keyboard? Which one do you use? There are tons of ipad 3/4 keyboard cases on amazon. I am looking for the one that allows me to insert the mini into the slot so I don't have to use the mini and the keyboard as two separate pieces. Preferably, I hope the keyboard can allow me to type comfortably while sitting in couch.