Something else worth trying over the winter might be the towel drill. You could do this to develop whip over the winter. The great thing about this is that you could do it indoors.
Best things you can do is long toss and work on flexility. Ease into it and work your way up gradually. The thing people lose or never have is flexibility in the rotator. instead of weighted balls I would even consider lighter balls to get your form and range of motion down and decrease risk...
Sort of serious. Certain times of the year they get bad around here. Annoying.
If I raise my glove above my head, they all go to the highest point. Dryer sheets work on mosquitos too? I will try that.
I think that set up could alter your swing plane and mess up your swing because you may be swinging to miss the bucket. That said, it would be much better to have a setup that you could change heights. I like your innovation though.