The point thread got me thinking about one of my more useful tools for quick and dirty checking in the drawer. http://www.tavia.com/free_degree_wheel.html You can print this, cut it out and staple it to a piece of cardboard and have a throw away or fillable (your choice) degree wheel. You can do all kinds of calculations from it, steering gear ratios, DEflection measurements, IC degree suspension measurements at a pivot joint, etc really handy. Hope it is useful.