I did it myself in 2007... the head rank # is capital in all the sequence
Took me like 2.5 hours to swap everything* inside the printer and go back to "fresh out of factory" quality.
*heads (2), cap station, dampers... the kit included everything up to the li'l o'rings, wipers...
'Wish I could do the same on my VS540... unfortunately the seller is no longer in business (eBay). 'Got great service, online support and precious advices throughout the whole process. My actual printer has only 1 head and it's f*****g expensive