Come on KL don't twist the facts. The boundary with Iran to the Nth is a big problem with the related QNH, Transition level problems, BUT, and its a very big BUT, Kitty would you knowing the existing problem we have with Transition level differences and the related QNH change problems, try and run 2 aircraft outbound only 1,000 ft apart with one at a non standard level of A110 and then transfer them to Tehran early prior to the sector boundary. I know I wouldn't. Cheers.