I am unfortunately unable to make use of the fantastic USB reamping features of the III, due to other bandmates’ preferences regarding 48k, and the need to pass working projects back and forth. So, my intention is to route the input signal out of output 4 to my interface, and reamp by routing the dry signal from the interface back into input 4. I know that with standard guitar amps, a reamp box is required to convert the line level signal back to a Hi-Z for the guitar amp’s input, but since input 4 accepts line level inputs, I assume that this will work fine. A friend of mine is insisting that I need a reamp box and that has me wondering if I’m missing some important detail. Any thoughts or advice would be very welcome. Thanks, all.