I am still working on creating version of Atlas N4 track plan, but now that I am actually doing the wiring I require some help. In order to creat the blocks, would it be prudent to place the insulators opposite the + terminal connectors are located? The only place where this would not work would be at the siding, and I am guessing that the insulator would go at the enterance to the siding just after the switch. This turned out to be more difficult that I realized. Grotto.