I'm a little confused. Are the smart keyboards designed to be left on all the time (pro 9.7)? its like you 'need' four apple accessories 1/ front cover 2/ back cover 3/ keyboard 4/ pencil But then- How much is it a pain to disassemble the covers 1 & 2 to add the keyboard? How are other users doing this (the keyboard would only be used occasional use for MS word as a laptop replacement). Thanks in advance.