Thank You very much for replying!!
Seeing as the revised executable and suggested steps above did not work; I decided to attempt with the Original code and instructions posted on the https://inkchip.net/soft/ page:
NewWF-2850, WF-2851, WF-2855
I followed the provided instructions from the web page INKCHIP_Instruction_WF4630.pdf; Which really didn't speak specifically to my printer in the instructions so I kind of made my own.
For STEP 4. Enter the printer in firmware mode; I took the updated directions above applicable for the WF-2850 family and initiated the update from a normal startup. This worked because I did have Epson cartridges installed, so I was no longer receiving the invalid cartridge error once it started up, so I had a normal startup.
I then initiated the INKCHIP.net_Firmware_WF2850.exe at Step 5 rather than stalling at 70 / 80%, the update ran to a clean end of job!
I did see the “FINISHED” on the display, however there was no flickering or anything else, it displayed it's normal printer status window. After about five minutes I simply shut the printer down.
Following again the INKCHIP_Instruction_WF4630.pdf instructions provided from the web page at Step 6 through Step 10 there were no differences!
I hope these instructions might assist someone else with similar issues to what I had run into.
I am a VERY HAPPY InkChip.Net customer 😉
Thanks again for all your input!