I'm confused, you said "You're generally best off finding a shop who sublets to a body shop under the same ownership umbrella"... is that finding a Infiniti dealership who will sublet the body work out and do the mechanical? and
"That way if it has mechanical or electrical issues that the body guys need advice about, they can pick up the phone." the body guys would get advice and then fix the mechanical or electrical? and
"the collision work all goes through one umbrella shop" it doesn't seem that the body shop tech knows much about mechanical, how would they know if your car needs to be looked at mechanically?
When I picked up my G37 and test drove it the sound that was created by the hit & run was still there but they couldn't hear it. I was told to take it to my mechanic or dealership and I have found no one wants to break it down to look for a problem.
Sooo... is it really important mechanics or bodyshops follow INFINITI Position Statements or use INFINITI equipment, tools or TSB's?