ROFL at the scientist pic, MJ! What an image!
I would refrain from being too obtuse with the potshots. If any brother thinks you are not sincere in a study, even though your questions are legit, then you will likely be dropped and your wife will be led to think that it is YOUR problem, not theirs. You could win 1 battle, but lose the bigger war.
One thing I've had to do is restrain myself from tipping my hand all at once...
I think that if you can persuade this brother to RESEARCH for you on the WEB about your questions, then you will have given him quite the gift. You could explain that YOUR research keeps going one direction, and you HOPE that he could show you PRECISELY WHERE you have misunderstood/mislead. This will require his reading 'apostate' literature, but you must insist on it if he balks. Tell him that it is impossible for him to answer to your satisfaction if he is unaware of the complete issue. And why would Jesus tell us to beware of false teachers and false teachings, if he did not expect us to be very thorough and careful?
Only thing is, that even though he might gain some serious doubts, it will be a long time before he would ever admit this to your wife. Maybe the best you could hope for is for him to say he doesn't know, and look uncertain or whipped... or that he would have to contact the Society... and at that point you could ask your wife whether it all comes down to "Bible (or Integrity) vs. WTS" in the end? Their typical response at being cornered is to redirect attention to something else (point out that this is avoiding the issue).
Good luck to you, M.J.
bebu