I wasn't really looking for specifics, just wondered if anyone made one with just one jelly roll. I think it would work. I just worked this out in Excel:
40 strips (2.5")
sew all together - 80" finished
cut into segments, say 6.5" cut size = 6 segments 80" long
equals 480 linear inches
a 60x80 quilt would be about 380 linear inches in perimeter. I guess I was to tired and distracted this morning to do math. :wink: