@amolith I don't see the vertical pipe (|) character anywhere. On my QWERTY keyboard, that's the shift key for the right-most character (the \ key that you mapped elsewhere).
Is that a character that you would need enough to make easily accessible on that layer?
@kcoram I have autoshift enabled for this layout (see the settings to the right) so all I do is hold \ slightly longer than normal and it turns into |. Same goes for all the other special characters