I do this before I glue the top and back on to ensure a straight clean cut. Come to find out, I hear this is the way Martin Co. used to do this long ago. I cut the tenon using the gents saw with a wooden guide to ensure an accurate angle.
I think doing it this way ensures a nice, tight fit, and I don't even have to use a clamp...
I glue it in using Hide glue because it fits so tight. By using Hide glue, I can release the neck easier if ever I have to take the neck out. There is a blog posting off of Paul Sellers' blog that refers to using Hide glue...
http://paulsellers.com/2013/04/titebond-liquid-hide-glue/
I will post more of the progress on the guitar soon. It is coming along very well.
I am enjoying the sound of the newest member of our family....
My son's horse, Adi can be heard from outside my shop window, and I find myself grateful for the simplicity of our lifestyle and the gifts we have been given.
Take Care,
Martin