Let me see now -
This is what? The third year that the PW3 has been for sale?
Hmm... four months shy of 3 years. ref:
https://www.mobileread.com/forums/sh...d.php?t=262358 (06-30-15)
I would suspect user error before suspecting there isn't anything ready for the PW3.
The best place to start, is to read the release (first post) of the release thread for each thing you are trying to use.
That includes opening any spoilers present and read that content also.
Then read any README (or similar) titled file include with the add-in, in its release archive.
If KUAL only displays a blank screen - there is a thread here for that problem.