I have two primary chisels that I use for most of my work on small inlet's. My straight chisel is about 3/16" wide and it does most of the work. The second, for the corners is just a rounded 1/4". Generally I just use a small part of the curve for getting a round corner round.
After all, a curve is nothing more than a series of very short straight lines.
After all, a curve is nothing more than a series of very short straight lines.