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    Hydrocal - pros and cons

    I'm building my first HO layout and I'm leaning towards a subroadbed of 2" foam over 1X3 joists at 12" o.c., all sittin on 3X3 L-girders. 1) Will structures using hydrocal walls be a problem because of weight? 2) After carving up the foam for scenery, if I finish the look with hydrocal for...
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