I tried using Helix into DT25 with L6 link and then DT25 cab out (no cab) back into the Helix mic in and recorded over USB. I used a Minotaur into a US Deluxe Vib then split to two different 3Sigma Friedman cab IR's out to the DT25. I set the mic level to 30db in global and split the signal. One channel is dry amp tone, other channel has Adriatic Delay and 63 Spring Reverb. Set both outs to USB 3/4 and recorded in Tracktion 7. A lot easier than 4CM, just L6 to DT and XLR back to Helix.