Epson 4800 print head clog

nozzle test pattern
A question for the hive mind. Epson 4800, inkjet clog, cartridge #8, light light black (there should be a light gray rectangle to the right). Is there a printer repair technologist in CHO who makes house calls? The printer is bulky, has no wheels, weighs 110 pounds.
Or can you offer advice regarding restoring function when the printer’s various cleaning cycles do not suffice?