Recently there was a reference to a full fledged tutorial on how to glue binding to a sandwich. I am including only the page on how to figure out where to sew the binding to the front of the quilt so that when you flip it over to stitch down it will fit perfectly:
Determine and Set Seam Allowance
Depending on what width strip you are using in my case 2.5″ we will need to figure out what the perfect seam allowance will be.
• Step 25: Use some excess left over folded binding. We will fold it into 3 with the goal of leaving about 1/8″ extra at the fold. Start by folding the raw edges inward.
• Step 26: Fold it one more time and wiggle it to get about 1/8″ extra binding hanging over at the fold (see pink box). Press those folds in place with a dry hot iron to create a crease.
• Step 27: Open the binding back up and you should now see the creases.
Step 28: Head over to your sewing machine and place your needle down into the crease closest to the raw edge.