Glad you got it, but just a heads up that this is considered bad practice! The T5577 chip in your implant is subject to ‘tearing’ - basically if it only partially writes it can brick the chip and make the implant useless. Thats why finding the exact sweet spot using the commands I mentioned is so critical. You want to be sure the write will work before you run it multiple times.
Yep, do this! Also make sure you run hw tune every time you use your proxmark.