Originally Posted by Vridar

I used my 15-91 making a Sunbrella boat cover using V-69 polyester thread. The edging was a rolled hem over 1 inch nylon webbing reinforcement. That is three Sunbrella layers with nylon webbing rolled inside. It was more than up to the task. Like others have mentioned, match thread to the needle for the purpose and more than likely the 15 will perform. I've tried the 201, my favorite, with V-69 but it doesn't like the heavier threads. The 15 never dropped a stitch. I do sewing for a marina and use the 15 when no one watches. At the marina I use my walking foot industrial as showing up with an antique home machine would tarnish my image.