I've already got Carpal Tunnel, so it's not use for me At least it's an extremely light case. Anyways, the 4x5 will do ya good for most things. It only has 512 levels of pressure, as opposed to the 1024 levels of pressure that it's bigger brothers have. I use a 9x12 at work, which is simply amazing. I use a 6x8 at home,…