I just use a really sharp pencil to trace the inlay then cut up to the inner edge of the line and the piece usually fits snug the first try. I never had luck using a scribe, the peice would move or Id get lines where I didnt want them, pencils much easier and less stressful to me. The bits are 1/16th and 3/32nd from stewmac along with the dremel base. The exacto knife is just for cleaning up the slots after the rout if necessary.
Neck carving day! It's still a little rough but I'll clean it up later.
Got rid of the sharp edges