Next Video "How to up/down grade to OS 3.1.And install Ndless on your calc!!!"

So here is the next video "How to up/down grade to OS 3.1"
hear are the links you will need
for the Ti Nspire CX CAS: OS 3.1 Download (For CX CAS)
for the Ti Nspire CX:OS 3.1 Download (For CX)
for the Ti Nspire CAS:OS 3.1 Download (For CAS)
for the Ti Nspire: OS 3.1 Download (For Nspire)
for Ndless Ndless 3.1(r903) download

This video is part one of two
 

here are the file extensions
             .tcc is for the CX CAS
             .tco is for the CX
             .tnc is for the CAS
             .tno is for the Nspire 

**Make sure that you put "ndlessresources.tns" in the ndless folder**

this video is part two of two