This is what I do now. I am a spaz though, and regularly dump in Rep-Cal also. My biggest reason for considering one of these shaker things is because I am tired of accidently dusting my brevs. It never seems to fail.. someone is sitting under where I am dumping bugs. I think I will make Titan's contraption and give it a whirl.I use to have a different brand crix duster and it sucked. I just get it done with a medium sized critter container and tap out to feeders while containing the supps. I cant really see a use for something else and its obv. pretty easy to clean a critter container then something with parts. To each their own I guess.