If you shape the handle carefully enough that it holds well as a slip fit, use whatever wedge appeals to you aesthetically. The hawks I have from CS don't have much, if any, taper in the eye, so spending the time to fashion a good fit on the haft has been important. I wouldn't epoxy the head on if you plan on using it much, handles are fairly disposable compared to the heads. I shape until the connection feels solid, rough up the contact area a bit, and give it a coating of silicon caulk before I seat it fully. With the excess wiped off and a day to cure, it plugs the head on pretty decently and cleans off a lot easier than epoxy when it's new handle time. And throw the set screw away, too, if you haven't already.