Hi ! Hmm, this kinda works but I get artifacts and heavy compression/stretching along the resulting object as the target curve (which will need to be bent in all three dimensions) does not have the same length as the base curve. also the whole process gets really, really slow as the flow command takes a while on more complex geometry. I guess I skip the live/interactive part altogether and do it sub-d in rocket. But thanks to the both of you!