Hi, I have faced this problem twice in the last month and was wondering if anybody could chime in. MyProjects doesn't allow us to build a standard ripplefold curved track either with D105-145-175. I have never heard anything about that in training and on Lutron's website it says "all Lutron curtain track drives will accommodate a single curve or bend; D145 or D175 drives are required for tracks with double curves or bends". We only need a 90 degrees bend for that particular track. I called CS once and they told me me only pinch pleat could accomodate a bend but it makes no sense to me as many other manufacturers (Somfy being among them) offer it with even greater possible lengths than Lutron. I have also seen them in action and they work really well. We have 4 other tracks on that potential job and I wouldn't want to lose it to another product. Thank you for your help.