special cutters that I bought from Stew Mac ages ago.
Both the binding and the purfling (made a similar way) were bent to shape on the hot iron (with a few breakages!) and glued in.
The first side I fitted the binding and left a channel for the purfling to fit later, but this was a bit messy. So, for the other half I fitted both together.
After scraping it down I think it looks quite smart