Yes, this will be possible. We will have the pledge manager up 10 days after the campaign ends and you will be able to purchase additional inserts, or correct your pledge amount then.
Yes, our inserts provide for storage of sleeved cards. We use FFG sleeves in testing.
Yes, you can pledge here for campaign 1 inserts. The full list is near the bottom of the campaign story, and they can also be seen in the pledge calculator.
It is also possible to pledge only for Campaign 1 inserts now, you do not have to order Campaign 2 inserts to make this possible.
Don't see the answer to your question? Ask the project creator directly.