Two questions about oil leaks

[aermotor]

I have some oil leaks that drip on the driveway after 50 or so miles mainly from the radius rods. I washed everything down from front to back and top to bottom. Run the engine twice over a large pan for 30 minutes each time and no drops in the pan. Did I learn anything about where the leak is coming from?

Driveway is level the oil level at 1/2 and the oil pan is dry on the bottom.

John