I edited my initial post to make it clear that I'm talking about "light" in color, not weight. When I posted that "...I chose an acrylic that was TOO DARK. ... bright showroom and picked a smoke color ..effectively much darker. .... I can barely see the TT/ arm through the cover.... if it was lighter-colored..... "
I thought there were enough clues there that I was discussing color, but apparently not. My deepest apologies for the confusion.