I want to combine plain weave with a stripe of twill. I don't have 8/4 in the color I want. Can I use a double bobbin shuttle with 8/2 on the bobbins and get the same result?
The only way to be certain of what this would look like in your design would be to weave a sample and finish it. There are a lot of variables - for instance - how wide is the twill stripe - a few picks won't matter as much as a wide stripe. Sampling is our friend 😉