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Some people might not want so many extra footswitches. Some people have specific needs that aren't addressed by the products you mentioned. That's why I posted a link to this product.
Exactly. I have an FCB1010 with a uNo chip, and Gordius Big Little Giant2. As great as they are, they can't do or as easily do as the Midi Expression usb interfaces. I have two different MIDI Expression usb interfaces. This is their third model. I have seen some other similar products by different companies but this is the first one that I saw that incorporates both 5 din midi in/out and USB.