[BeanAnimal]

Drilling the hole will help tp purge the air. However, the deeper you put the lines, the more pressure they will be under. A small hole will quickly backup with water and preserve most of the pressure in the pipe, reducing the flow. In other words, there is some wiggle room, but a shallow pipe will almost always work much better.

ToeTag, I assume you got it running and it restarts properly without having to fiddle with the open channel or siphon valves?