Hi, I just bought a Railking challenger from 1996 and it’s running well but I have a question about the smoke unit. It has a double smokestack and seems have gotten a bit saturated the first time I used it. Also is one of the stacks, the front or rear or both where I add the smoke fluid? I added it to both and it didn’t perform well. The instructions didn’t say. This is the first articulated engine I’ve been able to acquire so any help is greatly appreciated!
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