Thanks for this Matt, could you please elucidate a bit on how to set this up using EXP pedals in your preferred config...there are 5 values in the Perform-PP window and I'm unclear which to change ...
Here's how I'd do it.
1. In Axe-Edit, click the CONTROLLERS button.
2. Change to the MODIFIERS page.
3. Find and click first instance of MANUAL 1.
4. Change the SOURCE to your first expression pedal.
5. Repeat for other instances of MANUAL 1.
6. Now set each instance of MANUAL 2 to your second expression pedal.
Don't forget to delete the first two Per-Preset perform knobs (SWEEP and SQUEAL) as these are mapped to Manual 1 and Manual 2 and will no longer do anything.