Some of us seem to have missed the point its not one off test flights or dives,its cruise in routine service and it looks to me as if the Convairs might have it.Airbanda I think all the old Spantax Convairs at PMI have gone one lingered on longer than the others but I can,t remember seeing that recently I,ll remember to lookout for it on my next turnround it was behind the military hangar adjacenr to the 24R threshold.