Bad news: The ballast containers aren't coming. The website I ordered them from listed them as in stock but the guy didn't actually have any. They're discontinued and hard to find, so he refunded the money.
The good news: I used that money instead to buy all of the lead weights I'll need. So, barring some problem with the order, all I need now is to find an affordable source for 3x Otterbox 3500 in black.