[2way]

Given my history with Edge (albeit 5W-30), I am suspicious of a worn main bearing (possibly #4). Try a heavier oil and see if the pressure significantly improves? Its only a guess.

 

[2way]

how can you place blame on #4? what did #4 do to you?

This:

 

[2way]

that is a sign of contamination in the oil.

Documented 2.5k mile oil changes. Guess again.

 

[2way]

Do the cam oil sprayers spray oil all the time or only in lift?

From my understanding, they are constant.