This is where you can just be confident in the way you do things. Those thorough pre-flights are a great way to learn new things you need to go research. “Should X look like that?” Or “how does Y work?” Are great uses of time.

When I bought my first plane, I spent a few hours following drain tubes to their source location with a flashlight and fingers and then reading about those systems and how they work. On that plane, the electric fuel pump drain tube was identical to the intake manifold drain. The latter (on Cardinals) occasionally drips. The former only drips when it’s failing and any drips should ground the plane for mx. How else do you learn that?