Thats a good point, i should find somewhere to add this into the article. I've never gotten a chance to use one of the pinion depth finders. I'm sure it would save TONS of frustration and time. Haha, your eyes get nice and blurry assembling/reassembling those things over and over trying to get the pinion depth right, but thats not to say its not an incredible learning experience doing it the analytical way . Could you elaborate more on methods used in finding pinion depth? I know there are tons of ways which i didn't mention. Some methods allow you to find the depth using more common tools. Although i do believe you sacrifice accuracy with some of the 'bad' methods, haha.