Craftybear, I do not remember who he bought it from. There was a youtube video that shows you how it works. you might want to go there and check it out. I do not have the link or anything. I saw one at the quilting show in NJ, but that one you had to bast all three layers together and then roll it on the bars, this one you have three bars. Hope this helps for those of you that are looking. He has been looking at it to see if we can replace the wheels. It does not have ball bearings it is wheels on a track. Sorry for the confusion, I am not very name savy on things like that.