Finish HDF Finish Charts Finish Formulas. Expose functionality in low level records in higher level API Implement more record types. Add more dummy checks (for when API user's do things they "can't" do). This will involve exploring the various upper limits on the things Excel can handle. Add support for embedded graphics and other objects. Create new adapter object for handling MulBlank, MulRk, Rk records. Add a way to copy sheets.