Wirelessly posted (BlackBerry8530/5.0.0.601 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
"So finally my decision is to...take the Q30 to 169, take the F and transfer to the E and then the Air Train."
I suggest that you just stay on the Q30 all the way to the Jamaica Station Air Train terminal, which is the Q30's southern terminus.