Since there have been some troubles with WIPs and timemanagment I decided to make a Trello where every customer can check the status of their Commission, the due date of their piece and the basic informations.
Just follow the link to check how far I am with your work ;>

https://trello.com/b/0uiG1NeT

(customers which wait for their commissions right now got personal links, your commissions aren't in the new board)