I posted an update late last night, which promptly got eaten by the DB rollback. -______-
I've gone over the kits and, as expected, buying up some of them to the next tier will actually be cheaper than ordering exactly what people want.
I don't think it makes sense to double any of them since the biggest net gain is usually at the next tier.  We already have a crapload of orders, so what I'm thinking is this.  I'll close orders tonight (say 9:00 pm PDT -- about 10.5 hours from now), then do a final round of price reductions based on the buy-ups.  Then I'll send out invoices.