I'll bet you have answered this question before but I don't see it posted here?
Do you use power tools like a router and sander to make your saya or hand tools chisel and plane? If you you both how do you use them (I.E. Power to shape and form, hand to finish)?
Side question have you ever tried and succeeded at making one out of Burl? If so how did you keep the "pull out" under control.