Totally agree with all of the above (talking to artists, starting from the bottom etc). I had my one [upper] half sleeve done when I was near 170 a few years ago then then started my other arm when I was near my heaviest. I've lost a few inches on my arms since then and have lucked out with no distortion thus far but I also don't carry too much weight anywhere but my middle.
Amandie - me too! I've got so much torso canvas just crying to be covered. I think I'm more excited about that then reaching any number goal.