Rockwell28

After i get my v1 installed and custom tuned will my diablo be usless as far as adjusting the shift pressure and what no on my car. ive had the diablo for over a year it didnt come with the blowe. after they install a custom tune on my car will me playin with the shift pressure with my handheld jack up the tune they put in my computer? in a nutshell is my old handheld still usefull after my install or will it just do damage?