My OP was more about how to add/subtract weight in smaller than 50# increments, and be able to position it to not be concentrated. Not so much about how to have weight, e.g. water, sand, feed, concrete blocks, etc.
Perhaps I didn’t make that clear.
I guess I wasn't clear either. I break up feed bags. My base one is usually about 60 pounds or so. I have access to feed to do this.
Then I break up 50 pound bags into smaller weights. 10. 15. 20. 30. They are bulky enough I don't get that feeling of having diving belt weights all at the bottom. I move various weight bags in and out as needed.
And a look at a feed store can answer a lot of questions. 50 pounds of milo is smaller than 50 pounds of cotton seed or horse and mule etc...
I'll leave you alone now I suppose. But I've tried quite a few ways and so far feed bags is where I'm at.