Share 'mariner's compass'

just a question, I would like to do a center medallion quilt with a Mariner's Compass in the center, am I going to have a really hard time if I try to do this on my machine, or am I just asking for trouble all around...I haven't found a pattern with the size I need, but my DS says that we can "size it up" to fit what I need, am a little nervous about starting and so I was wondering if anyone has…