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[quote]QUOTE: Originally posted by Don Gibson SOLDERING JOINTS prevents rail expansion / contractioen from temprature changes = BAD!. Sometime when you find your layout with 'bowed 'rails, you'll find out why you want to leave expansion joints. It only takes once. BETTER to use rail joiners to align and allow slippage, and under-table feeder wires to elecrify the track. [/quote] Agreed. But one exception to this might be flex track sections used on a curve - soldering these together helps prevent kinks.
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