If this were pre-cut to the size A that I needed, it would have been much easier to install.  Even if it were just perforated on the various sizes A, B, C, etc, then the cutting would be must simpler.  It also does not have any attaching method, it just sits under the cover.  As far as the cover goes, it only comes with one stretchy attachment strap.  I need to purchase a second one to go around the neck of the board because the felt underlayment causes it to puff out at that point.  Can anyone tell me where to purchase a additional stretchy attachment strap for a size A board?