An assembly for distributing particulate material comprising a blower assembly which is preferably removably mounted on a mobile platform and structured to generate a forced flow of air along a flow path and through a manifold assembly connected to a supply of material being distributed. On the first and second axes, respective linear bearings have movable carriages, and backbone-free linear bases acting as exclusive support or linear bearing supports. Bloomed fibrillated acrylic pulp is added into a microporous layer ink. A prominence score used to determine the display parameter may be calculated by dividing a count of click-throughs by a count of page views of the page containing the hyperlink. Further, a clamping device is provided to prevent premature movement of the shelf assembly.