Live and learn! But I have a couple of questions. Do you sew a piece of velcro to your fabric, or will the hook side of the tape hold fabric? And what happens when you have scrolled far enough so that stitched fabric is wrapped around the velcro? Doesn't it make a lump?
The velcro attaches with glue, just like a piece of tape. I've never had an residue remain on the fabric when I've pulled it off.
And, I never had much more of a lump than using the sew on type with staples in the rod.