I am making a Vanessa rig using instructions I found in various places. The question I can't seem to find an answer for either in posts or images, is where do you hang the plumb bob from. Assuming I go with the standard 1x2 with a dowel rod and a thumb screw to adjust tension on the rod, should I center the line holding the plumb bob on the bottom of the 1X2. I saw one picture which, though it wasn't clear seemed to have the plumb bob hanging with its line wrapped around the dowel. Wouldn't that be itself off finding CG by half the diameter of the dowel rod, or is the difference too small to matter.Thanks.Jack