Hi everyone, I have just made a single interlined curtain of 4 widths and it had 15 pleats in, quite by accident I had a spare shelf bracket lying around and found it was a really useful tool to push inside the little tube to help smooth the seam out before you pinch the pleats in. The bracket is angled so I got quite good leverage and the pleats turned out really well, and it saved my poor hands from aching too.