Elle, dont be unhappy with them, but K3n is on the button because they do need to be absolutely identical. I usually get 6 x the pattern repeat plus half a metre (just for when I cut one wrong!) - and I like to have the extra bit so I can show people what I started with. The pattern is not too large though - I like to use a 24" repeat for the best effect.
But using them on totes is a good idea if you dont use them on the back of the quilt. The front of that quilt is stunning, so dont fret about doing these on the back.