I do something similar to that - if you go back to the way I did H4 you can see. I dont fold however, I cut the freezer paper,pull back ever so slightly and sew right on the line where the papers meet [dont know if it makes sense, but the pictures show it [think it's post 1940]. I did look at the thatquilt tutorial for the folding method though - it is an excellent and very easy to understand tute! Thanks for mentioning it.... here's the link:
http://www.twiddletails.com/store/in...age=page&id=21