I was looking through my staves for no particular reason the other day and came across one that just inspired me. It inspired me mainly because it was ugly, and I wanted to use it to get rid of it. It had some wavey grain, a slight bow, and a little strip of brash wood near the heartwood side of the stave. I decided to hew the bow off it to see if I thought I could get a double bit handle out of it before I cut it in half for hatchet handles. Here's how the project went.
A 3 1/2 lb. Collins era, Sager DB head I picked up a few years ago. The stave is BARELY wide enough to even think about hanging this head.

I'm thinking maybe at this point.

It's gonna work, but the shoulder is going to be a little narrower than I like on a DB.

It's shaping up after a few minutes of hewing.

Making the tongue, and fitting it to the eye. Also starting to cut some facets with the rasp to ensure I keep the handle straight, and inline with the tongue and shoulder.

Working on the shelf, and facets.

This picture is a little confusing. I'm holding the tongue in my hand while sighting down the haft for straightness.

Final facet tweaking with the rasp for geometric uniformity along the full length of the haft. This works for curvey handles as well

Finally, the tongue is through the eye and ready to be hung.

Kerf was cut, and the head was hung with a sassafras wedge. It doesn't show in the picture, but I even cod locked the wedge by driving it deeper after trimming the tongue. Thanks guys, that was a nice tip I learned here on the forum!

The thickness of the haft is 13/16ths along the length.

The swell.

A little file work on the bits, once through the oxidation layer, that old Ward's Master Quality file made pretty quick work of this part! After the bits were profiled, I hit them with a carborundum stone and then 180 paper.

I took her to the woods this afternoon to work on maple windfall. The axe feels good and smooth to me and seems really accurate. For those that speak of flexy handles, there's some pretty good examples of this in this short video.