I tried 7.0.1.1 but it starts to stutter while playing video after a few minutes. Like the FPS drops to 5 and audio turns off.
Is this same for you as well?
I simply used the SD card with the 7.0.1.1 made sure it worked ok then followed the same procedure to InstalltoNand command. I would however just boot from SD card with 7.0.1.1 and give it some runtime confirm its ok before you install to NAND. It working well for me but it also keeps me stuck on Jarvis.