I might be on the slow side; I have put together this layout on a 4x8 sheet of plywood. So far everything is working fine. I am running DC for this layout. I am having a tough time finding or labeling the blocks for this. I have purchased 6- prewired 1 meter IR sensor train detector for signal controller master board. I need to put my IR sensors at the blocks. Please advise when you can. I will try and send a copy of the layout.