While responding to this thread (Query on Surface Book Power Base), I discovered something. I own two Surface Book devices: A Surface Book with Performance Base 1TB, and the original Surface Book 512GB. Either of the clipboards can be detached from the keyboard base and interchanged with the other. The clipboards (screens) can be attached normally, or reversed/folded back. I have microSD cards in each base. The cards were immediately and properly recognized by the new clipboard. Each pen remains paired to its respective clipboard. The Performance Base or original keyboard base can be used with the original edition Surface Book clipboard, or clipboard sold as part of the Surface Book with Performance Base. At the time of this writing, the base (keyboard) and clipboard (screen) are not sold separately.