What a bunch of great replys! and pictures.
Empty bins? Not a problem for a quilter, they will soon be filled and you will want More empty bins, LOL.
My hubby made me a 'big board' as requested one year for Christmas, Love it, however wood will warp when it has lots of steam applied........ask me how I know
.......so since we've turned it around and put limited amounts of aluminum foil directly on the wood, covered by 1 thickness of insulbrite and removable ironing board fabric that I put elastic on, I've had good success.
Oh BTW: I have also marked the edge of my big board cover with magic marker to measure 1/4, 1/2 and 3/4 yard increments so if I need to do a quick check to see how big that scrap is I can do so without hunting down my measuring tape [that should tell you how often my measuring items go missing.