You said it, Cranky.
As for the
oil pressure, I have always gone with 10 psi per 1000 rpm.
Excessive pressure costs power and you run the risk of breaking things. It takes a lot of twist to generate all that pressure and in any case it's the lubricating properties of the
oil that keeps things going not the pressure of the
oil.
As long as you have some pressure you are OK - the Cosworth-Fords I raced indicated zero pressure at low RPM after a race - you needed to keep them revving for the pressure to show on the gauge. Never seemed to hurt them.