Hi Sewflower, I have always put the binding on after quilting the sandwich and squaring the quilt. This is how I was taught at the classes I have taken, also what I have read in the various books I use for inspiration. Not to say that there are not other ways and I am sure others will let you know what they do.
The quilt police have no jurisdiction over you!! Down with anyone who thinks that they are the quilt police.
Sue