Again, great insight - thanksIf you are obliged to use a dealership service department...
I think the trick (especially with add on installs) is getting the right tech (you want the pick of the litter) at the service department and know the tech has the experience with such an install and the right tools. You arrange that this tech do the deed so to speak.
IF, I am obliged to use a dealership service department, I find out in advance who their lets say lead guy there is, and arrange for him to work on the vehicle when I bring it in. Along with the right tech, it's important that tech has the necessary tools, and or, that the service department has the necessary tools.
Recently, I needed a decent, tech that had a magnetic induction heater kit. (Google it) Service department's locally, did not have one. I found a local tech with a terrific rep, that had his own. Yeah, I broke down and had him do an install for me. His having his own $400+ induction heater and his solid rep, sold me on him.