@Nabush That's unfortunate about not being able to buy a Party Box from MPP. I understand why they want to vet customers for it, but an experienced autocrosser wanting to autox their non-P Model 3 seems like a legit use case. Do they only want to sell it to people buying other parts from them?Mountain Pass is a little bit cold in selling the Party Box it looks like to me... It's so shitty Tesla does not give the option of buying the track mode for boost owners...
Someone once told me Ingenext's modules can dial back or otherwise reprogram/replace the nannies too. This was in the context of a Model Y (where there's no Track Mode even for MYP), but I am seeing a "drift mode" feature listed on their Model 3 modules too. Sounds like it keeps ABS while disabling TC. Unclear if it also forces a strong RWD bias to the power delivery though like Track Mode's Drift preset. I imagine that would not be good for autox times.
Since you already bought Tesla official AB I think you could just get Ingenext's cheaper "bonus" module, which I believe gives most or all of their boost module features except for the actual power boost itself (which you already have from Tesla).
I don't have any Ingenext module and haven't looked into them closely, so take all this with a grain of salt i.e. do you own reading / research to confirm all of this.