On the bolt pattern did you go center of the lug to center of the lug ?If you went from outside edge to outside edge that will throw your numbers off.They do sell tools to make it easier like
http://www.made4uproducts.com/cart/p...?prod=80-21692 Or a pcd gauge is 10 bucks on ebay you use it on a rim but will tell you the bolt pattern or anything really.