This keymap attempts to match the Kinesis Contoured (aka Advantage) default layout as closely as possible. See http://www.kinesis-ergo.com/wp-content/uploads/2013/06/advantage_layout_win.pdf

Apart from the obvious mappings, this keymap also:

• removes the dual-purpose momentary layer/normal keys: Z, /, and Grv; because the author--coming from a Kinesis keyboard--finds the delays and accidental modifiers to be more disconcerting than helpful.

• puts Esc in the bottom left since there's no place for it in the top left to match the Kinesis.

• changes the bottom-right key into an L2 toggle since there's otherwise no way to get to L2.

• adds PrScr, ScrLk and Pause to the L1 keymap, down the left side, since they're present on the Kinesis but not available in the default ergodox_ez keymap.