LaPierre StudioSupreme Slider, Multi-Colour, 21.59 x 29.21 x 0.38 cm

Does the slider work as well on a machine that sits on top of a table instead of dropped in and level?

How thick is the material? The needle plate sticks up about 1/8" above the bed and the ruler base. My longarm is on a 12' frame, not a sit-down type.

Wasn't this mat originally designed to be used on machines that didn't drop their feed dogs?

Does this supreme slider have the pink underside on it?