I just use a plane.

Woody - if you don't mind my asking, what is your process? Do you just use radius templates and a straightedge and plane away? I'm curious because I would like to try a compound radius on my next build but am unsure of how to go about it.

I did one by making a radius jig for what I wanted at the nut end and what I wanted at the bridge end. I roughed in the radius at either end and sanded in long strokes, connecting both radii with a sanding block and then a t-bar. I had the worst trig teacher, I'm sure he's an absolutely brilliant mathematician but he was terrible with people. I didn't want to break out the hard math for mine and this seemed like a reasonable approach.

I have an older grizzly sander similar to the G1140. This sander is slightly cheaper than the G0512. It has a tilting table that allows you to sand bevels. An auxiliary wrap around table could easily be made and mounted to the tilting table if so desired. This sander also shows an optional horizontal mounting configuration.
I have used the G0512. It works O.K. but I didn't see any great advantage to the wrap around table, and not having the tilt table limits it somewhat. Why it would be priced at $20 more is a mystery to me.
Chris Paulick posted a video of his fretboard radius sanding jig on the MIMForum (tools and jigs). Looks like a nice way to go.

I did one by making a radius jig for what I wanted at the nut end and what I wanted at the bridge end. I roughed in the radius at either end and sanded in long strokes, connecting both radii with a sanding block and then a t-bar. I had the worst trig teacher, I'm sure he's an absolutely brilliant mathematician but he was terrible with people. I didn't want to break out the hard math for mine and this seemed like a reasonable approach.

Good to know, John. Did you like the results?

Like you, my time is better spent building guitars than jigs. The sanding method was the only way to go for me, since I use aluminum in a lot of my inlays. I've been using the Grizzly 1140 w/ the radius attachment for a little while, a few months, and it's been a real timesaver. The results are good, and very repeatable. They claim that the min and max radii are 10" and 16" respectively -- this is a bit of a stretch, I've found the max to be more like 15" when measured w/ a radius gauge.
I start with 100 grit to knock the edges off and rough the radius, and go up to 220. The belt changes are easy, as is the tracking adjustment.

Let me know if you have any other questions.
-DC

Four bolts and my jig off and ready to hang on the wall

Have you tried it with a compound radius yet or just a standard radius?

Woody - if you don't mind my asking, what is your process? Do you just use radius templates and a straightedge and plane away? I'm curious because I would like to try a compound radius on my next build but am unsure of how to go about it.

What do you use to sand it?

No facets left? Do you scrape or anything? You wouldn't happen to have any pics of your process that you could share? I'm always amazed at seeing those type of things done with hand tool and planes and the such.