To make it relatively short: Handling independent tempo/signature parts in Logic IMO still is one of the major shortcomings. That's why many people wish for some sort of "conductor track" so much. And while you can copy tempo/signature events in the appropriate editors, it's still no fun at all doing such things when arranging a song with complexed individual parts (just imagine something using 3 bars of 4/4 and one bar of 7/8, I just had to deal with such a song, fortunately it had no tempo changes...). A reasonable conductor track could perhaps cure all of those problems. Alternatively, when copying things one could just be asked (just as with track automation) whether one would like to copy the signature/tempo information along with the part as well. Anyways, just because of these shortcomings I often do not care about proper time signatures but just "copy by grid" - this at least works as long as there's no tempo changes. Sascha