I think the whole brushes thing needs real development. I hate also, as you found out, when exported to other vector app the sudden effect of a tight curve leading to a large spot on the page. It only happens if you draw a curve with large brush size at a tight angle. We should have the ability to make Calligraphy/Grunge type brushes. We should not have to put up with bitmap brushes with low res. output. I know that I can change that by going into the Registry and increasing the res. but this should be done through a drop down or right clicking the line.