At one time, Sharon Schamber had a youtube video on stretching a block - which I was unable to find again last night.
I was very surprised about it when I saw it at the time.
I did manage to stretch a 5 inch block to about 5-1/2 inches (unintentionally!) by sopping it with spray starch and ironing it out when it was wet like I was rolling pie crust.
I have learned so much by doing things incorrectly the first time!
