UpDate - 13 inch Sashing - Thank YOU!
Okay, I listened to all you great quilters and took to my Singer Anniversary machine and used a decorative stitch in every sash on the quilt - I think I solved the issue with 10" allowance but having a 13 inch sash. I even made the back look good! Here are the pictures and whew - burying the knots on all of these is what took me 3 days to get back to you! Appreciate your help.