John, Thanks for that. Hopefully one of the authors will recognize that little vent. Might have been connected to the urinal - or worse. :) I looked at some of the other photos on the Internet and the oval and round screened vents are visible as black dots just underneath the flaps. It would appear they were on all of the version from what I can tell.
Have you ever tried adding the "wrinkles" to the fuselage of the circle-type indents on the rudder? I saw a B-52 modeler gently carve some wrinkles into the fuselage and it look great. The challenge with the B-36 is that the wrinkles are evenly spaced on the magnesium parts of the fuselage. The wrinkles in the rudder leading edges appear more random and the circles on the rudder are quite visible. It would be nice to duplicate that look as long as it doesn't cause one to go insane trying.