While I am using 2 two sheave pulleys vs the Weeden supplied 2 three sheave pulleys, this little guy's small gear slips on the larger gear if I give it much more weight than my little brass stamp despensor. Granted it's over a hundred years old but I have the two gears alined as much as possible. I seriously doubt it could have done 4 pounds with the 2 three sheave pulleys, as I can't even do near a pound now with the 2 two sheave pulleys without it slipping the gears (I tried with a H&K DC motor). Well, it might have once or twice - maybe.
Now if that little gear on the shaft was better made, I am sure it could have done it all day long. But as it is right now, it has way to much slop between their teeth! It would be sweet to have a new custom gear made that alined perfectly as possible to the larger wheel.
Regardless, a nice little accessory that I feel lucky to own! Oh, now I know what you are suppose to do with the Empire's B-34 & Windlass Variable Speed Unit - to bad its in Texas LOL