The Workstation Courier bag: http://www.fusion-bags.com/products/f1-workstation-courier
This bag has been designed as a FUSE-ON Bag for the Fusion F1 Premium Series. The bag can hold small controllers and laptops up to 17" in size. The Workstation Courier can be carried as a single bag AND/OR it can be attached to a F1 Premium Guitar bag. This very popular system is called the FUSE-ON System.