I couldn’t find my metal level so I ended up using my dad’s old wooden one and balancing it on top. His 30 year old level may be a little warped come to think of it. If you look real close the actual difference in my picture is 11/16”, I just rounded up. I’ll concede maybe another 1/16” for wood warpage could bring my measurement down to 5/8” over stock...maybe. That would get our measurements within 1/8” of each other. There may be differences in height because of the way the covers are made. Each one is cut, bent, and then welded to the flange. The flange is then milled flat.
I may have a tall one, you may have a short one. (that didn’t sound right)
I may have a tall one, you may have a short one. (that didn’t sound right)