the fear of sandwiching is the main reason I bought a LA. I can have a quilt loaded on the frame and ready to start stitching in about 30 mn.
I have never tried the flange binding, have never even looked fully at the tutorial. I do mine by machine and the narrow foot on my juki is perfect for getting a nice even topstitch just along the edge. It's one of the things that sold me on buying that machine. I took a bunch of test sewing with me, and one was a bit of binding on a potholder size sandwich.