I am still planning my build (which should start on the main board this weekend), but am going to build a Keyboard encoder card for a II plus keyboard to interface with the Apple 1. I am going to use Vince Briel's Microcontroller from the SuperEncoder. In my decision I know others have used the "Repeat" key for clear screen. I was thinking of using the key instead as suggested by Vince to keep the repeat key. Before I go down tearing apart schematics to see if this is even possible should I bother. Will I need the key?