Hello, I have a 2017 RAM 2500.

I've used the MM3 for a year, and my VGT took a ****.

I bought a 3rd gen swap and S366 turbo with EFI Live tunes.

My question is this: The shop that did the weight loss on my truck also installed the MM3 and did not back up the stock tune file.

My EFI Live guy told me it's okay, and I don't have to return to stock on a 2017.

He says the Auto Cal will overwrite the MM3 tunes with no issues.

Does anyone have experience with this?

The last thing I want to do is brick my computer.

Thanks!