I leave lots of thread on the back, then put a knot in those two top and bottom threads, about an inch up from the quilt and bury them in the quilt. All the threads I cut off I put in my flower gardens, the birds use them when nesting. (Every couple of years we take the bird houses apart and clean them out, repaint and put them back - they need doing again this year, [ATTACH=CONFIG]415907[/ATTACH] that is how I know they use the threads).