I do not know if you have to super-mommy-sens to make head or tail of this product , and I certainly do not have any . I be fully confuse with this installation . the instruction be very inadequate , only a few word and rudamentary picture on the back of the small packaging - not to mention that the most of the instruction be cover in a sale sticker , thus render they completely useless . I end up with bit and peice that I simply could not figure out at all , and a very ` rig ' installation . Boo . Hiss .