install ndless nspire cx 2 t

Hi, recently I bought a ti nspire cx 2 t and the first thing I did was update the OS (damn me!!), then I found out the existence of ndless.
Do you know if there is a way to downgrade from 5.3.2.129??
I really want ndless and I have a huge experience with "root" devices, but this time I don't know how to do, I tried everything.
Do you know if there is a way to downgrade from 5.3.2.129??
I really want ndless and I have a huge experience with "root" devices, but this time I don't know how to do, I tried everything.