We do not have a factory, production line, image for the PW-1.
There where two builds of 5.6.1.1 - one for PW-1 and one for PW-3
Those devices have different SoC chips with different processors.
So just stick with the existing PW-1 directions -
Follow the downgrade process in this thread -
Then use the older 'universal jail break' to jb the PW-1 while running the 5.3.4 (there is a typo in the first post) -
Afterward you update the PW-1 to 5.6.1.1 and the jail break will survive.
Just ask someone who owns six of them.