I weave a lot of scarves in 100% rayon boucle with a cotton weft. The wrapper on the hank suggests using the umbrella swift in a horizontal position (perpendicular to the floor) and winding the yarn into a ball (not using a ball winder). Well, a ball winder is just so easy that I ignored that suggestion. This yarn has a lot of energy and, at the slightest provocation, winds back on itself. I recently spent far too much time winding separating strands - and winding it into a sphere. But it took an awfully long time to wind an entire hank into a sphere...
So I attached the umbrella swift to the back of a desk chair, put the hank on the umbrella swift, and wound the warp from the umbrella swift. Went very smoothly. I tried different chairs to find the best height and was able to move the chair to get a good angle. The umbrella swift would be a little more secure if the chair had square corners, but I can work with that.
On the picture, the warp end being wound isn't very visible, but you can see the set-up.