I purchased the FBV 3 for use with the Line 6 Amplifi series. I have the Amplifi TT and added the FBV 3 to added foot control functionality. The device works GREAT with the exception of the use of the LED capabilities. The description by Line 6 is misleading in that the LED color functionality only works with a couple of their devices. Line 6 notes this in the ultra small print "Assignable color LEDs available for use with Firehawk 1500 & Spider V only". I am not impressed. Does anyone have insight into when this makes it's way to the top of the list?