Pipe Brush Diff 6.64 9.73 -3.09 7.89 8.21 -.32 1.83 2.17 -.34 .42 .75 -.33 .85 1.61 -.76 .29 .75 -.46 .57 .83 -.26 .63 .56 .07 .32 .76 -.44 .37 .32 .05 0 .48 -.48 .11 .52 -.41 4.86 5.38 -.52 1.8 2.33 -.53 .23 .91 -.68 .58 .79 -.21