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I own a WF-7620 and I seeking to convert it to a chipless printer using the WIC tool. However, I hope I can have the following clarified. The link below shows a table of supported Epson printers: https://chiplesssolutions.com/support.shtml For my WF-7620 the table shows "AD21G7" for Required Firmware Key. And "NA" for Activation Key. Can anybody please clarify what the "NA" is about? Does it mean it is free for me to use this chipless software on my WF-7620? And is the "AD21G7" still a functional Firmware Key? Additionally, on the website link below: https://www.2manuals.com/product_info.php?products_id=1149 The notice shown below appears about my WF-7620: "The reset and read counters function are NOT available for this models (adjustment functions only):" What does that mean? Does it mean the WF-7620 chipless firmware is not working at 100% ? I ask because nowhere in this forum thread can I find a clarification on the bold notice shown above. I hope somebody in this forum can explain what possible limitations exist. Will I still be able to Scan and Fax if I install this firmware? Lastly, I still need to buy third party refillable ink cartridges for my Epson WF-7620 printer. What is the correct refillable ink cartridges I can buy that will help the WIC firmware in working problem free? Any advice that points me to the best online store I can buy the correct third party refillable ink cartridges from will be greatly appreciated. Thank you for your time.