Any one interested in the oiling mods I did?

Phreakish said

A garden hose through a stripped block is not analogous to an assembled engine.

It is possible that there's some unique situation at #4 caused by machining methods or the way the oil passages are routed that results in a greater reduction of flow at #4 when outflows elsewhere exceed supply. But it's not due to velocity.. It would be due to an imbalance of flows caused by inconsistent flow demand at various passages.

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If you sealed the unnessesary passages I do not see how the test could not be valid. A hose say right at the rear galley port would simulate the location of the large volume of oil from the pump.
I don't know the details of the test, just the basis of how Atherton
Determine the unequal flow. To me it jives with my dash example.
A long galley opened at the far end, and the large volume of air or oil at the other tends to run right by the nearest passage to the pump until restricted down stream.