I was reading “10 tips for better O gauge track” under “layout contstruction and wiring” and I have a few more tips.
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When cutting a piece of track with a hack saw, use the finest tooth blade you can find. 32 teeth per inch blades are readily available, but 60 teeth per inch would work better.
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Put WD-40 on the blade.
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Bend the center rail slightly to one side to provide a tight connection between sections. This works better and faster than trying to make sure the pin holes are tight. The bent center rail provides a spring force for the contacts, and this spring force not only makes a tight connection in the holes of one track section, but also makes a tight connection between the pins and the section they are mounted in. Recently, I put together an addition to my layout (a carpet railroad), and used this technique. It has 124 sections of track, 5 crossovers, and 19 022 switches. It has only one feed from the transformer, and the train speed indicates minimal voltage drop around the track. I haven’t checked the voltage drop, but I will in the near future. Using this technique, the track can be disassembled easily, and then reassembled without reshaping the holes in the end of the track. Let me also mention that some of the track I used is very old and somewhat rusty. I have never put together a layout of this size and had such good continuity. BTW, you cannot bend the rail on the frog end of the 022 switches. You can bend the rail on the point end.
I have some interesting information re 022 switches, but that is for another day.
Bruce