Copyshop is a simple Doppler for mail
BUT
Copyshop B is more difficult there you have to transport mail AND paper to the industry to get the double amount of mail, but if you inly transport mail and not enough paper the mail will be destroyed at the copyshop.
But if the mix is right, you will have twuce the amount of mail you have put in

COPYSHOP
http://snirc.sytes.net/modding/download ... 30&lang=en
COPYSHOP B
http://snirc.sytes.net/modding/download ... 31&lang=en