Quilt Clip - parametric

My wife needed a clip to hold a rolled up quilt while she quilted it in the sewing machine. She'd heard that you can use a pant clip people use while cycling. I found a few models for such a clip here on thingiverse and tried a couple but they weren't quite right for the job even after scaling them down. So once again I fired up OpenSCAD and threw together a design and printed it. We tweaked a few measurements and then printed up a handful. She's happy with it so I'm uploading it. Yet again