Only have done one set, 1911, and only Walnut. But they weren't terribly hard, just time consuming. The Nicholson rasp is great, I used a coping saw to cut the pattern. A woodworker's bench with vise helps a lot. Beyond that, it's sandpaper from rough to fine, and I just used boiled linseed oil. Only electric tool was a drill press for the holes.
That said, I would need to make a few dozen more before I considered myself competent.