Dr Evil I think you know how much we vector when sequencing into Dubai (and increasingly Abu Dhabi), too F*****G much, and I can safely say that I have never in 4 years controlling here had a pilot transpose heading for flight level, and I never use headings ending in 5's, 6's or anything else other than zeros. I clearly state "Turn left heading zero five zero", and I never give a turn instruction in the same transmission as a climb descent instruction. It really takes no more time to split the transmission into 2, and I think actually saves time since more than 6 words in a clearance to some airlines out here will always require a repeating of the clearance anyway. So personally I find the whole debate about ending headings in 5's to be a bit of a crock. But thats just my personal opinion, and I am sure ICAO knows best.