what causes my proto 3 engine to start puffing smoke rings towards the end of the fluid in the smoke unit. When it does that it puts fluid drops on the boiler top, but when I stop it and add a drop of jts it immediatel stops doing it. I would like to bring engine to a stop before adding fluid. One dropper of jts smokes for about 5 minutes, but my recording in the handheld lasts 8 minutes and I can't get a full smoke out of one dropper full. Has anybody tried the 40 drops that was recommended awhile back? Yes I know I could reduce the recording to 5 minutes but I don't get all the cool things done in that time, plus when I have visitors the recording lets me talk to vistors and not screw up while talking.
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