Well done!
The main point, and, I have been telling this to folks for a while:
You controlled the conversation by controlling the question.
Three rules for interacting with JWs:
Whomever controls the question controls all.
Do not ask a question that you do not know the answer to, in full.
If you loose control of the question, stop. Another time....
Wishing you well in your Journey and, hopefully, in time, this Elder will be your companion!
In this Struggle with you,
V