PW4 5.11.2 jailbreak ?

Hello,

Some two months ago I received my first kindle PW4.
I believe (I am not sure) that it came with a 5.11.2.
If I remember correctly I downgrade it and ended up with a 5.10.1.3 jailedbreak

Today I received a new PW4 for my wife. It is a 5.11.2. (stupid me, I forgot to wait until the black Friday).
I cannot remember what I did with the other one. I have been browsing the forum for hours without any result.
Can someone tell me if it is possible to jailbreak a PW4 running 5.11.2 ?

Many thanks in advance

i$