Another consideration -- I noticed from the URL of the image you just posted that you are using Scotweb's tartan designer. If you pay attention to their "terms and conditions" you will note the following statement. "By saving and/or publishing a new tartan design using this system, you are granting Scotweb Marketing Ltd an exclusive right to weave, license, or otherwise use your design commercially."

I think the key word here is "exclusive." Which means that the decision whether or not to use F&K to weave your tartan may be a moot point. By using the Scotweb designer, you may have given them the exclusive rights to weave your design, unless you can make some other arrangement/agreement with them.

Always read the fine print....