I don't have any fancy milling stuff, so here's how I get by...
1. Cut out bolster peices oversized. Don't cut the actual profile, just squares with the right overall dimensions.
2. Drill to fit the pin holes in the tang of the knife. I do this before any shaping so that it doesn't really matter if the holes are a little bit off as long as they match the tang.
3. Now I put pins in the holes to index the 2 peices together and grind them to match the profile of the tang. Be sure to get the rear edges that will meet up to the scales profiled to the angle you want(not the dovetail, the line formed between scales and bolsters)leave a
little extra meat there.
4. Using a disc sander, with a work table set at the angle I want, I grind the bevel for the dovetail. Do this very slowly, grind and check, grind and check, until you bevel just barely goes all the way across the thickness of the bolster. If you do it right, the bolsters will still match up, since you had them profiled the same.
This isn't overly difficult, but you really have to concentrate to get the bevel ground without changing the line the back of the bolster follows. Because of this, I go for a pretty simple junction between bolters and scales. No long sloping lines or anything.
5. Get some 400 grit or so wet dry paper, and a good sanding block
(I use a piece of precision ground steel) and lap the beveled edge of the bolster nice and smooth. Don't overdo it, no one will see it. You just want to get rid of any deep grind lines, and take off any burr that might have formed.
6. Pin them on.
Now for the scales.
1. Cut out a block oversized.
2. Grind a bevel on the end, using the disc sander set at the same angle as the when you did the bolster.
3. Lap bevel to insure that its flat
4. Push the scale firmly into place against the bolster and clamp it there. Now drill a pin hole, and put a pin in, drill the next hole etc.
5. Repeat for the other scale.
6. Shape handle, and do handle work as normal.
Hope that at least gives you some ideas on how to go about it
