Does anyone have an idea about how the values for IR Low Cut, High Cut, and Level correlate between Helix and Powercab? Example: Helix Level = -18 - +6 Powercab = 000-127 or Helix Low/High Cut = off- 20 Powercab = 000=127 Also, can the Helix actually change the presets (not IR's) in the Powercab? If so, how?