Thanks for sharing Tobiya.
With regards to step 3 I did exactly what you suggest, entered WOS address in my Primal profile however, when subsequently trying to zap I got a message prompting me to "click here" to set up wallet. I was reluctant to do so as setting up Primal's own wallet requires to enter name, email, date of birth and country of residence (why o why, I still wonder?). In the end I grudgingly went down this route anyway as it seemed the only way I could start zapping on Primal...Thanks in advance for any clarification.