I purchased the triple bracket and installed it on the ceiling after making an adaptor to hang it that way (it’s intended for wall mount). I added a roll of paper with the hand operated lifting shaft, works perfectly. Then I added a second roll, using the solidpro muslin backdrop. This works also, even though I was advised the system really was for paper or vinyl.
For anyone interested in hanging the muslin, I purchased a 2” PVC pipe, 9 ft long. It wasn’t strong enough and sagged in the middle with the weight of the cloth, creating creases when the cloth is rolled up. So I changed it to a 2” white plastic pipe used for underground sprinkling and gas venting (also available from Home Depot). This is much stronger and doesn’t sag. The weighted chain isn’t heavy enough to balance the weight of the cloth, otherwise the whole system works very well.