Hello,
Theoretically, I believe in testing when necessary but there are "too" many ideas circulating on this science. I am really not offering any answer but the sound fact that testing should ensue. Believe me, it may seem silly, when I say, "Testing is necessary."
Seth
P.S. Just to get the story correct, you are trying to dictate what is the best placement for your antennas. Right? I have only tested the BBBW and the antennas in a room where the bot has only gone 10 to 15 feet away from my WiFi signal source. This was also w/out an enclosure. If I get this nifty enclosure I want to get one day, I will relay my findings. Also, I plan on taking this bot on the road and testing it outside of my comfortable domain. So, I can reply w/ my findings on this particular circumstance. This group will allow me to bring in my bot and test it in their space. During testing, I should get a feel for how much space I can actually use, if you are going to be interested, w/ my "reliable" WiFi signal at their location.