I'm just gonna say that I've tuned my own cars in the past with a full standalone ECU (LINK), to a piggyback system (TurboXS UTEC), to an OEM reflash using OpenSource software.
ALL of them allowed me to re-do the pedal motion and rescale it to really any value I needed. If I want WOT to be at half throttle, I could do that via simple programming.
I would suspect that a proper tune would do this, and you wouldn't need a band-aid product that simply re-scales a simple potentiometer function.
That said, knowing what it's doing(re-scaling a value), and what you'll gain (Nothing). Don't bother. Get a proper reflash
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