Newly demandated

[Emberlegion]

I have a mechanic doing the mechanical items necessary to demandate. He told me he can do his own tune, but after reading your forum I know not to trust him. What kind of info do you need to send me a good tune file? Is it as easy as just running your file or is there excessive fine tuning once installed? I don't need any extra power(ruin engine life), I just want it to run as efficiently and smoothly as possible without the dpf/scr/egr. Thx in advance for your help or input