The Model 1600 has two new options effective April 2017: 1. There is a quilter’s extension 1670 that can fit in the top drawer when it is completely pulled out. This adds a lot of extra support for large quilting, sewing and crafting projects. 2. There is a new side extension 1690 that fits on the right-hand side of the cabinet adding a nice spot for your scissors, pins, and a nice piece of chocolate. These new extensions are $79.95 each plus applicable taxes.