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To me it's a very sophisticated way of saying it breaks up at 4 on the V knob ! :)
Here's another postulation for you to reflect on:
Every amp is a "real" amp
I put a 90 degree bend about 3/16" from the end just like I do for any other tuner and stick the bend down the slot.
I have a suggestion:
Spend $10 on a set of flatwounds and see if they slip, and don't listen to us shmucks for an opinion on this,...