Ah, maybe I wasn't clear, heustonconnolly, I didn't mean cross it over the Boyne. I meant stick in a set of points north of the river, as prototype on the level. You're right, that would look odd at best.
Regarding the Navan branch, I wasn't clear where it would go after it reached (as on the plan) the extreme bottom right corner.
It's getting into shape anyway. Your latest plan looks a lot better, but (as I'm finding right now with a thing of my own), proper scale drawings will answer many questions.