FRETS.COM
Shop Tip #300
© Frank Ford 2006; Photo by FF

Let me introduce you to "Friendly Plastic."  It's a weird craft material that comes in pellet form and melts at the temperature of boiling water. Melt up a batch of this stuff, wrap it around any tool, give it a bit of a squeeze as it cools, and  you have an instant, custom-fitted ergonomic handle. At room temperature the stuff is fairly rigid and feels like polyethylene. Try it.  It really works.