FWIW... Modified blues driver is not how I would characterize it after reading his article. the back section of the circuit is basically from a blues driver, the part with the 120hz hump that is adjustable via the dip switches.
But the rest of the circuit structure (gain stage, pre-dirt eq, post dirt treble cut) is much more similar to a zendrive, or other op amp ODs with feedback loop clippers like the Timmy. So it’s more of a hybrid taking ideas from different circuits.
Just hoping to avoid confusion/ jumping to conclusions if anyone reads this thread without checking out the aion article.