It's hard to get the right size wood for scales. It's either too short or too narrow or too fat or too thing. The best solution I've found (before I had a bandsaw) is to get 1x1 turning blanks. They'll pretty much accommodate any scale shape. You can rip them by hand with a Japanese hand saw and cut out the shape with a coping saw. Together, the saws are about 40$ on the high end.