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  1. What's the best way to add smoke fluid to MTH Diesel

    O Scale
    I have an older MTH GP-7 diesel that actually smokes very very well. I've been adding fluid as the manual says and I know I've never over filled it. The manual says to add 15-20 drops in either of the openings. I always use the rear one which is more of a straight shot to the smoke unit. I...
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