Nice one buddy.
The NExT is a great first implant and jumping in point.
There is plenty of information for the Mifare Classic as it has been around for so long.
I’m sorry I couldn’t be more help with the Ultralight, I really must get myself a FlexMN.
As an implant, this has only been around for a relatively short period of time, and people are still working their way through its inner workings.
Some info in here
and video guide here that you should get something out of
