I always used my Concordance; still do, when I need to find some Dub point and quote from the NWT.
From what I saw, Dubs were encouraged to use it, but whether they actually did is another matter, eh?
It seems to me......... the problem is more about them being free to do open research, not simply limit themselves to looking into WTS publications to "prove" Dub theology.
Conversations I've had in recent years lead me to think that the Dubs themselves hold the "Greatest Man" book in the highest regard, believeing that this gives a "non-doctrinal" view of Christ and his ministry. Of course, we know it does no such thing, but it's still interesting to hear that view. Interesting too that the dubs should hold a book about Jesus in such high regard. This highlights what is lacking in Dubdom, a full realisation of the role of Jesus. But I guess we don't want to hear that!
Our brother Farks gave one example of the bizarre. How about this modern one:
In the "Daniel" book the "ships of Kittim" (Dan. 11:30) are said by the WTS to be the ships of the British navy lying off the west coast of Europe in the First World War! Well, we all knew that, didn't we?
Cheers, Ozzie