Now that I thought about this copious volume of fluid needed...is there damage done to the whistle smoke unit if it doesn't get fluid, in this case the whistle smoke generator which obtains fluid from the stack fill? I test ran the Challenger for about 45 minutes so far and it smoked up my basement - rather small overall size - ostensibly with the stacks using up the fluid before any could reach the whistle unit...hoggers.
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