I am using a new fret-slotting jig I built based on a design from http://sixgunguitars.com/fret_slotting_jig.html
It uses a razor blade for a slot locator. It works great!
I decided to build it after doing my first fretboard for a dulcimer stick. It was hard to get the slots perfectly straight. This little jig will be a real time saver. And the quality of my fretting just went up!