To answer a couple of questions from earlier posts:
The BWIA L-1011's had an extended rudder not a rudder extension. The rudder cord was increased aft of the rear spar with addition of a new, wider, cap assembly. They used the same trailing edge wedge as all other L-1011's. The fairing above the No. 2 engine was also modified so the extended rudder would match with fairing. Unless you know what you are looking for it entire modification is almost un-noticeable. The front spar was modified to by the addition of a counter weight below the existing counterweight. While there was a Service Bulletin to accomplish the modification it was accomplished on only the first two BWIA aircraft, the other three BWIA aircraft were equipped with factory built extended cord rudders. Yes, there were five BWIA L-1011's, four were delivered to BWIA but the fifth (which had been a BWIA option) which was s/n 1250 (the last L-1011 built) was modified to VIP configeration for the Algerian goverment but delivered to Saudia Royal Flight.
All four BWIA operated aircraft were certified with a GTOW of 504,000 lbs. The Saudia Royal Flight aircarft was certified to 510,000 lbs. The change from 504,000 to 510,000 lbs is a paperwork change only (flight manual revision that Lockheed accomplished for a fee) no aircraft modification was required.