I've said it a million times, I need a Cintiq. Sketching with a Wacom tablet is not easy. I have to have my free hand on the "x" undo key constantly, and every line I make takes at least 3 tries to get it half way decent. Luckily this is only a sketch, I couldn't do a refined picture without a Cintiq, not with the brush tool anyway. I have been doing my refined work mostly with the line tool and using the handlebars to make the line perfect, but it take much longer that way.