Think I'll try my next project in Logic

Yikes, I never used Flex time for anything, although I have used Flex Pitch on rare occasions, I no longer use it at all because it created artifacts all to often. I was told once finished, make a bounced copy, then turn off flex pitch on the original track, this way you still have an unaltered original.

Don't forget, if you do change tempo, pitch will change too, and if you record any new tracks, you have to tune to the rack by ear.

Kcat, you'll probably never get an answer to a Logic pro question from Apple's 90 day service number people, you need a trained Logic Pro expert. There's usually at least one expert at each Apple store, so go there and make a new friend, you'll need one.

Man, I gotta get out more. I'm not a great bass player, ut maybe Flex could have helped me on some of my demo tracks.

I've globally changed tempo and tracks are all off, but perhaps it's different using Flex. I doubt that the dsp engine could keep pitch the same every instrument while changing the tempo, but I'm not sure about any of this.

Third times the charm: thx Wiz/m57 etc., that worked perfectly.

I find I have to go into the tempo marker automation lane and manually move the line to the tempo I want but I set all tracks to flex then did the tempo change and worked perfectly.

A little silly, like porridge temp, o, I don't mean to be a bear about tempo, but I found 90 a little slow, wasn't certain about 93, so did 95 as well: easy peasy: am liking logic a lot.