"To get the droppers through the trackbed and the foam and then the baseboard surface a long 250mm x 6mm drill was used, this was fine provided you didnt drill into a cavity in the foam, because there is no long hole for the wire to follow if you do, and feeding the wire through becomes a lot more difficult" Geoff - many thanks -this is EXACTLY the information I was after, and Andy - you've raised the next point. Had I not got an answer I was considering making a void in the baseboard and a cavity through the raised section... At the moment my layout is flat - straight to ply baseboard, but following this thread and the utterly superb landscape you've created I am considering ripping it all up and creating a raised landscape, but before I do, I want to work out just how I wire it all - expecially leaving space for points motors... ps- when you say 2 droppers per each section of rail - do you mean two sets? Thanks again for answering