I like it but my problem would be I would forget to fill the center so I guess I would have to carrry it 1 step further and ad a valved tub to the center which would extend up to a hopper the way I invision the tube valve wouold be similar to those used on agriculture planters each time the center part was positioned straight up the valve would allow a measured amount of feed then as the normal rotation took place it would function as you have made it.
OK Marv maybe I should enter into a competition with you for designing the world's most complicated fish feeder I could add in more clock work and gravity teeters long spiral down chutes weighted pendulums. But why should we have all the fun how about letting the fish actually feed themselves by making then learn to swim through a water wheel? I actually tried that one, But I heard somewhere that a gold fish only has a 3 second or 3 minute memory or something like thatand the guppies were too fat to swim through,but I digress LOL
Seriously though Cascao, I do like your fish feeder, back when I had my aquarium I was forever trying to think up a way to feed my fish which would allow me to be gone for a couple of weeks without having to buy one of those pricey automatic feeders. My best solution was to give one my daughters's little friends a key to the house she loved watching the fish as much as my girls did she was over at our house so often I sometimes worried that I had 3 daughters.