If you want to get an extra manifold in a different color pattern, simply add $5 to your pledge. This will allow you to change the appearance of the clock from time to time.
i.e. If you wish to get the kickstarter limited edition + extra manifold, pledge $65.
Applies to the following rewards: Manifold Clock ($45), Kickstarter limited edition Manifold Clock ($60), Two Manifold Clocks ($90).