Tacye, what would you think of the greatest pedal harp in the world if suddenly you had to move up for sharp and down for flat. Sorry, but this is a pretty well-established convention by now and it’s always been a failure when people have tried to make people go backwards.
If you never ever ever play anything but your own harp and don’t mind having to do the opposite of what everyone else is doing in a workshop or whatever, they may be great levers–they look very well made–but he can’t expect to have wide adoption by doing them this way.