I thought I'd charge my Chally 2 up this afternoon, as it has been sitting on a shelf for the last four years, while a stream of other models have pushed it down the 'Use me, please!" queue.

I sorted the battery, and then looked at the HL manual to remind myself of the location of the 'Hole of Filling'. (It's on the right, behind the Turret, and underneath a removable vent). Looking at the manual, I noticed that the recommended dosage of smoke juice is 5-6ml. That seemed like a lot to me, considering that I recalled other hole-filling measures described as 'drops'.
Curiosity aroused, I checked my Taigen manuals. There, it was suggested that 1-1.5ml would suffice, once the residual amount from factory installation had gone up in smoke.
Some of the HL manuals suggest 5-6 drops (not mls) should be the right amount. Well, there's quite a differnece between a 'drop' (from a samll plastic pipette) and an 'ml'. In fact, there's a hell of a differnece between 5-6ml and 5-6 drops. Has anyone ever worked out the perfect amount?
Hitherto, I've just put in a few drops, as my tanks never run for the 1hr or two hours cited as typical runtimes, in the manuals. I've never burned a smoker out, nor flooded one- so far anyway, but someone using 'mls' instead of 'drops' could easily flood one. Is there such a thing as a standard 'drop', anyway?
I should stress, I use non-standard smokers in my build projects, and their needs are different. But most of my Taigen/Torro/HL models still retain the original smoker.