11lml remote tune?

so i have a 11 lml, been tuned before . looking to get it redone with my own mpvi3 . looking to understand the
process . . not sure if this is how it would work? find a good reputable guy on here, give vin he wrights a nice off road tune, i pay, he emails a file then I download it to my lap top, read mine and hpt puts it back to stock, then i just load the file from my laptop to my truck and im good to go???.. and ant recommendations to a good guy for the job?? thanks for any advice I can get. I figured since i have the program and i use it at work doing ls dod deletes on ls trucks I might as well use it on my truck too..