If this supported the N810 keyboard, it would kick some serious a55. Also, there TI-83+ skin has some problems. On the X^-1 button, the yellow text should NOT be finance, but matrix.

Also, why so many calculators? If there was just TI-84+ Silver, it would cover all the functionality of the rest... Maybe TI-86 and TI-84 (old gen and new gen).