You may already know this, but it's worth posting for osmeone searching via google
I've been trying to make helmet liners (dorag). I haven't had much success. Friends have told me to tear one i like apart and copy it. No way. It's sewn too nice to do that.
What I did today was to use painters tape (less tacky than regular masking tape so easier to remove). I masked over each segment, removed, and transferred to a brown paper bag. Added a 1/4" all around for seams and whalah! A pattern of each piece needed to make a form fitting liner.
John