Thanks, Roy.
I've tried hard beeswax and softer 'white, refined' beeswax, melted with violinist's bow rosin. The result was rock-candy texture, so I added some paraffin oil. The result is ok, but too waxy and not tacky enough. I persuaded a pulp-and-paper mill analytical chemist to send me some 'tall oil', the raw by-product of the 'Kraft' paper pulp process. Some tall oil, melted into the mixture is tackier, and works quite well, but it smells like hydrogen sulphide(etc). I'll keep trying, because I wanted to add a wax that I like to my flyshop, taupo.com/flyshop. If I could find Overton, I'd just ask him to send me a case of his wax but, if I can't find him, I still want to try to make it.