[giantfan270]

So I got a little bored sitting here at work so I whipped up this little chart for those of you who are interested.

<a href="http://s1188.photobucket.com/albums/z417/aviat0rshades/?action=view&amp;current=bgsgrades.jpg" target="_blank"><img src="http://i1188.photobucket.com/albums/z417/aviat0rshades/bgsgrades.jpg" border="0" alt="Photobucket"></a>

The 4's and 5's were vintage and the 0's were either re-slab or GCR. Love that chart.