Please post a pic when you get your scalloped runner done. I love scalloped things, but doing the math is intimidating, I think I need one of those tools.

Eleanor Burns also has a tute on using her ruler that gives some good information about dividing the quilt to get the scallops to come out right.

mltquilt

Sounds like you got a lot of suggestions from rulers to plates and bowls. Will watch for a pic of the final runner. Have fun and learn something new.