The instructions that solventinkjet.com provides are identical to the service manual.
Chapter 3 Head Replacement - these are the detailed instructions for head replacement.
I did this right along side of ex Roland tech (stayed in touch with the guy who did the initial set-up on my printer). When all was completed what we had done was exactly what is outlined in the service manual, nothing more. Never looked back at the expense and printer has printed beautifully ever since, even the black. I am extremely careful to avoid any head strikes so that I don't end up with deflected nozzles again.