Thank you for the great info Dan, it is useful
. The birch plywood i use is made here in Sweden and it's very good for scrolling. Easy to saw and clean cuts.
What i didn't know was is if it is the same that so many talk about here in the forum.
I buy them in a lokal store in sheets who is about 1 square meter (close to a yard).
They cost from 13 dollar for 6 mm and up.