Was starting to build up a bike with 9 speed triple components (Mirage). Just found out that there were 10 speed Veloce triples which I was unaware of. I could sure use an extra cog in the mountains. My question is - can I use an older 9 speed crank either veloce or mirage on a 10 speed system(cassette and shifters). Also can I use a mirage front derailleur (triple) on a veloce 10 speed triple crank and 10sp system?

thanks
jack