Mine was pretty straightforward, engineer gave me a list of what he wanted done and let me do all the work.
I had to use the springs & shocks he dictated and do the castor correction as well. He came to my place to check it all and fitted the blue plate.
Nothing complicated at all, I now have 3550 kg GVM.
One of the strange things I had to also do was swap out the side indicators for cat 6. Something to do with it now being light commercial category.