@dustbro Thanks! Hmm... But I don't have a dsp network going at this point!?!
EDIT: You were right... I didn't have a script fx, but there was a dsp network still loaded somehow... I had to unload it first, now things are good again!!
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Found the culprit!
The value of my xfader node which was modulating a delay was set wrong, so it was inducing a fixed delay when at rest.
One crisis averted! 10 more to go :beaming_face_with_smiling_eyes:
@dustbro Use a cabinet impulse response - there's no feedback without any kind of non-linear response. If you can make an impulse response from just the pickups, you'll get the closest to a "naked" feedback signal, but I wouldn't know how to achieve this.