Need help! Cant get back to kk base roms

I have been on this D801 TMO LP Extreme v1.0 rom since may. I like the rom its really nice but i want to go back to a kk rom. So ii download the 20g boostack and the OptimusG3 Rom V1.4.1 rom. First i wiped....flashed firmware..then flashed optimus rom...o wss stuck in bootloop. Then i flashed the firmwear...wiped...and flashed optimus rom. At the end of that flash it says something about loki failed or something like that and i was stuck in bootloop again. So i ended up flashing 30b bootstack and extreme rom again...how do i go back to kk? Can i get some help here? What am i doing wrong?
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