Oh I LOVE those Silver Maple leaf ones - I saw a whole qulit done and wondered how it was done!
I just attemtpted this very fun technique this weekend and posted a few pics in the pics thread
http://www.quiltingboard.com/posts/list/12480.page
This is the Harry Potter site where I got my patterns from
All FREE!
http://www.sewhooked.org/paper_piecing/hp_paper.html
Sheila