Opinions on Downgrading to 5.1.1

Hello again!  One more question.  I am currently running the 5.3 untethered but considering downgrading to 5.1.1 since I believe I can install the plex channel on that firmware.  Am I correct or does it need to be an even earlier firmware?   I know about the plex connect but not a big fan of it and I like having the trailers app available.  Thanks again!

Do you have saved signatures for the versions you want to downgrade to? If not, you wont be able to downgrade.

I do have the signature saved.  Just trying to figure out if its worth it since I cant get infuse to see my folders on windows 7