I agree with Chris on the method. About the ferrule, if you use a caped sleve type as Chris is talking about, it's not as strong as a threaded one. Here's why.
First there's not to much to glue too, with a sleved ferrule, just a caped cylindar, with straight side walls. With a threaded one, it will allow you to tighten it properly, and it has more glueing surface, becase of the male and female threads........My choice, threaded for sure.
blud