I am working on the tapered bearing replacement and I could not see the mark that Quadrifolio was speaking of, but I realized the edge of the tapered bearing cannot exceed the lip of the ball bearing curve. I measured from the lip of the ball bearing curve to the end of the shaft and it was 8mm. On top of that, I took the pictures from above and loaded them into photoshop and measured the width and length of the cylinder at the end. Quadrifolio stated the width is 15.88mm so I was able to ratio out the length of the cylinder. Using both pictures, I came up with 7.9 and 8.1mm - good enough for me. I am having the machine shop cut it to 15.88 wide and 8mm deep. I will let you know how it goes. The next step will be to thin out the washer.