It sounds like you have already passed into the "nice to have" stage. IMO you don't need a chronograph, a media separator, case tumbler or digital scale. If you have the money and the desire to spend it on reloading gadgets do it. But if you ever think you are going to justify the expenses on the basis of "how much money you save" it's not going to happen.
I also noticed that a couple of you have bought into the fallacy that your expenses for reloading equipment are an "investment." Your reloading enterprise is not going to make you any money, so it's not an investment - It's just a fun hobby.
I would suggest putting your calculators down and have some fun! Shoot, reload, and shoot some more.
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