Hi @GreenSock,
I found this code snippet with the comment (here).
"It sounds like you're trying to make it travel at a certain constant velocity and dynamically update the destination value, right? "
var myElement = document.getElementById("yourID"); //the element to tween
function move(element, y, speed) { //"speed" is pixels per second
if (!element._gsTransform) { //forces GSAP to parse the transforms...only necessary the first time.
TweenLite.set(elem