Here is the difference. Keep in mind that the LH hole has been cut out 1/4″ oversize. We set the weld back 1/4″ as a good compromise between giving us enough room to work and get in there with a planishing hammer if we need to for stretching any shrinkage, but it is also still close enough to the flange so that the weld itself is under the chrome trim. Not that it matters – we grind the weld smooth anyway.