Thanks for all the comments, guys. i wanted to see if I could build my own and come up with something good, and I'm pleased with what came out, though later today, when i make the final version, it'll be better yet, with a little velcro strap to hold it neatly wrapped and a double pocket in addition to the loop on the head end.
As noted, I don't generally use a stringer for a longbow, unless I run into one that's just too heavy for me. Funny thing about getting old... every year, a higher proportion of the bows are too heavy, and a higher proportion of the ladies look young.
Dick in Seattle