Guess what I found in the web after I packed a parcel for my friend with the last writing case?
A very good idea of how to realize a case like that with much smaller risk that something might fall out.
This is the link (click) to the binder purse! Have a look! Isn't it great? Need to make this for Version 3 - ehhhmm - some-when in the future :-)
with something else than writing cases!