I do all of my drafting on old dot-matrix printer paper (you can see the little "feed" holes up top if you click to make the image bigger). I work out the designs in pencil over rough outlines of the characters. Then I use a lightbox to make sure the measurements are correct before transferring the designs to the actual watercolor paper for coloring. I'm actually considering doing these clothes on cardstock instead of water color paper since I will probably be coloring them with markers instead of paints.
I'll probably make some changes on these before they are finished, including more specificity in the pattern on the vests, and adjustments to the lapels on the winter coat there. Not sure about the hat on Tennessee. I can't imagine him wearing a hat, though surely he must have one. I might change it to another style. I have some ideas, but I will reveal them later.