The Week of Never Ending Plexiglass

The theme at work this week: Plexiglas that is cut just slightly too large to fit into the frame I am trying to assemble (I work in a custom picture framing store). Three or four pieces have had this problem already and it's fairly delicate business trimming an eighth of an inch off a large and no longer paper-masked piece of plexi. I wonder if the trend will continue or if I'll get a reprieve because of my good behavior ;-)