I never really saw the reason for these and they are plentiful in Japan. They really could only turn Diesels and Tank Engines as no steamy with tender would fit. Isn't it true that there are 3 sizes of Plarail turntables? This, for one engine, the one we mostly see that could fit an engine and tender and the giant turntable that will hold a 3 piece train which is way too big in my opinion.
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