Great, there you have an illustration of the specialist motor engineer & the generalist mechanic. All your specialist tools are restricted to your speciality, overheads are your tools & transport. The upshot is great value & potentially greater reliability.
Whilst I can do those jobs within my compass I’ll get on with it, when I can’t & providing I can still get in, out, drive safely, see where I’m going & where I’ve just come from, I’ll get a specialist in to do what has escaped my capacity.
To illustrate, I’m now off to take the drivers seat out , the webbing has failed & I was unceremoniously dumped on the floor (fresh one to be picked up tomorrow).
M