I was watching one of those home improvement shows the other day and noticed that one of the painters was using an 18" roller. I noticed another using an edger that had wheels on the side to keep it a set distance from the trim. Historically I've eschewed devices such as edgers because they do a worse job than I can do with a brush. And the 18-inch roller looked pretty unmanageable. But I decided that I needed to move into the 20th century and try a painting technique that wasn't invented in 1890.