I just watched the new show with Eleanor Burns and in the beginning Ricky did the string block. I loved the knee trick.
I started collecting strings. The difference is I use the left overs of adding machine tape and the tape from the credit card receipt printer
. When you are near the end of the roll there is a little red stripe on the edges. It is no sin to change the roll and put the remainder in my scraps basket. When I'm doing other machine piecing and I get a strip "too small to keep" I sew it onto the role of adding machine tape. Pretty soon that roll is full. It rolls back up onto the core until you are ready to cut it into diamonds (60 or 45 degree) for Strip LeMoine Stars.
Pati