Same as Figure 6, but using the total grain surface at each radius limited to the maximum 2% of the gas surface density to test potential effects of the removal of small grains through planetesimal formation/growth (see the text). Note that the color bars in Models 2 and 3 have different ranges than Figure 6. The absolute flux of the rings has been decreased with the reduced grain amount, but the overall morphology of the disks is unchanged.