Picture of Add Card Tube
Important Life Lesson: If you use a plastic bottle, leave it in there. Just cut off the top later and pretend you planned it all along. Removing a cardboard tube? Absolute nightmare. I wrestled with mine for a solid 15 minutes and reconsidered my life choices. Shake the can a bit to settle the plaster (or just whack it on the table a few times—gently), then let it sit for 2-3 hours until firm.
