Drummer3 posted:My current layout is all 027 tubular with come 042 lionel switches. They work fine except sometime my MTH passenger cars short out. This is the cars's fault, not the switch's. The rollers on these cars are wider than Lionel rollers, and they short the center rail with the ground throw rail. Solution was to put masking tape on a 1" length where the short occurred.
Drummer is spot on. I had a good-sized layout in my basement with O27 track, max 42" curves, and several 42" switches. I got the same occasional short-outs like he suggested. I ended up having to apply hobby paint on the frogs to prevent metal from the wheels hitting metal on the switch. Might've used tape, too, from time to time.
If you haven't purchased them yet, look into getting K-line brand O27 switches with 42" curves on the used market. I've been accumulating them for my new layout in a bedroom (now that 3 of my 4 daughters are in college or done with college).
