Oops ! I checked online & see that Marsha has also fallen into the "make a new ruler to sell" group, her original method only required a bias square ruler to make any size.
If I can find some instructions that are not copyrighted, I will post them.
by-the-way====copyright laws cover a multitude of situations. everyone should make themselves aware of the
stipulations of such.
enough, I will shut my mouth now.