[Q] Downgrade from 5.1.1 to 5.0.1 on T-Mobile (SM-N915T) possible? Maybe even 4.4.4

Has anyone else downgraded from 5.1.1 to 5.0.1 or 4.4.4 on the T-Mobile variant? I have done some searching and I have seen that some people feel it may brick the phone. I have seen some go from 5.0.1 to 4.4.4, but not from 5.1.1. When I received my Edge it was already on 5.1.1 but the battery life is pretty awful and I am hoping for better results on 5.0.1.

I have already tripped KNOX and am running RiverRom if it matters.

Download from this link