I'm a newby to scrolling but I'm also cheap and an experimenter. My lines are wobbly, but I'm learning, and I hate sanding. My solution - I take an old blade and cut a strip of sandpaper usually about 1/4" wide 6" long, fold it in 1/2 lengthwise palace the blade in the fold, a little glue being careful not to get glue on sanding side and mount in the saw. I have found this to work really well for inside and outside cut sanding.