Definitely not the KEL84's, these were EI from the start. WAD did use torroidal PSU and O/P transformers for one of their earlier budget amps, not sure which one (may have been KEL34), but as you say they later changed to EI's for the O/P's. Interestingly, WAD continued to use torroids for PSU transformers on several other power amps.
Certainly all the views I have read seem to rate the WD transformers as better than WAD.:)

