Jeff,
This won't answer the question in your OP but…
I think I have added the grosgrain loops and shock cord to any quilt that I have made out of sheer habit.
The thought has crossed my mind recently that if quilts are sized right and have a sufficient amount of material they can be self tucking and stay put without the need for shockcord or straps and buckles.
For example I will describe my tuck and roll method of quilt "donning".
Using the drawstring style foot box, insert your feet into the foot box and while sitting up close the snap closure at the top of the quilt. While still sitting up put the opening over your head and adjust the drawstring closure as you like it. Put your arms inside, lie back and gently "roll" side to side once or twice. Your top quilt is now magically self tucked. If your quilt is properly sized it will stay that way unless you roll onto your side or go all "fetal position". ;-)
The trick is to properly size the circumference of the quilt around the shoulders, hips and waist area. The length of the quilt is the second element. If it is too long there won't be enough "tension" on the material to aid in tucking it underneath your body as you roll side to side.
BTW My 30* Wide, overstuffed Revelation X arrives next week. ;-)
Party On,
Newton