ANCIENTOFDAYS - I suppose you don't really care what the outcome of this is, so what the hell, meet with the CO. He asked for it!
I found what you said here interesting: I would meet this man out from his role
This is really it, isn't it? When and elder or co or whoever talks with you, you aren't really talking with a person, your talking with a role carefully constructed by the Watchtower Bible and Tract Society of New York, Inc.. Funny thing is when you take away the role, you have a guy cleans office buildings at night.
Also your choosing to have this "talk" in a coffee shop (as opposed to the KH or your living room) serves to erode his CO role by decontextulalizing it. I'm sure he will be quite uncomfortable in public. But then again, if he's willing to undgergo such discomfort, I'm pretty sure he's going to make it "worth his while" ie, he will make sure you're DFd.
BTW - ask him for me what he's going to do for a living when he's put out to pasture on his 70th birthday.