Agree +2

So many people buy a "tune" like it is a wheel or air filter.... it is so much more complicated than that. Ideally you are buying wisdom and knowledge and skill - for a tune it is imperative that you know and trust the tuner, and that they have demonstrated competence in the field.

As JCL notes, there is so much more than fooling the ECU/DME/DDE into overboosting.

It can be done safely, but someone with that skill will not be the low bidder...

A