Let me answer some of your questions:
- I think Toolbox2 can reset the SRS, I would need to check. I'm sure it can reset the TAS. A T-Can Pro can reset both of them. In your Model X, I think you wouldn't need to disassemble anything. I don't know about Toolbox3, but the only time I checked I found it quite limited (the external version available to us if we pay).
- If I'm not mistaken, you're working on a 2016 Model X. If it has MCU1 (the Tegra one) it can be easily rooted. That would solve all your woes with supercharging/DC charging (I would recommend that you don't supercharge, though). Then you could install the CCS ECU. You can follow
my thread and
the Model X thread.
- For rooting MCU1, ask
@LayZ in this forum. There are (old) tutorials around that were nice while they lasted, but they don't work any more.
- Tesla won't help you enabling any kind of DC charging in a salvage car. If the people of the service center near you are nice enough, you'll be able to buy parts and service your car normally.
- I would not spend money on a CHAdeMO adapter, get CCS.
I have a T-Can for rent, but it's currently rented. I also have Toolbox2 access, but I'm in Utah. If you lived closer, I would be very willing to help you.