I keep getting that Blue Press Catalog from Dillion and it looks simple. or so I think. They sell the press which looks like it does everything. But I dont understand what else is needed I see primer installers, so I presume the press doesnt do that. I see tumblers which makes sense to me. I see case trimmers, expanders and a host of crimping dies. So what the hell do I need? Whats bullshit?