Track plan could have been hard if it wasn’t for ordnance survey Ireland. I put on a historical filter and simply zoomed in over carn and Fahan and took a screenshot. As you can see they are excellent, buildings and track clearly marked and labelled. I hope to formulate a track plan soon and I’ll put it here when I do.

I hope to complete baseboard construction soon and meanwhile will wrestle with a problem. Hornby or Peco code 100 track?