Thanks for the input. I ran to wires to one end if the main line and discovered I'm not getting any electricity thru the second switch. Gonna have to run more wires. Once I get it so the engine will run over the entire puzzle. Then it will be time to locate uncouplers. Rare earth magnets is what I may be going with. I bought more kadee uncouplers off eBay and they are a lot thinner than my original uncouplers. Gonna have to experiment. Right now I'm too busy working in the yard and garden to spend time on my puzzle.
