HP Photosmart 6520 Printhead Fix

Just take your time and really keep an eye on all the delicate ribbon cables. This kind of process could probably apply to most printers with non-disposable ink printheads. I did this for some friends, hopefully it helps someone else get some more life out of their printer.
If all else fails, printheads can be found on eBay and elsewhere for around $30 and this video can be used as a replacement guide too.