I am flattered to hear, that my build was an inspiration to anybody. And I have seen your Gotha at WNW site. Amazing. And huge, too huge for me to fit into my model cabinet. And now, to realize, that I suggested you to build something with less rigging... I am feeling ashamed and will feel more ashamed with every update of this build...

As for the levers - WNW modelled only one on the right-hand side of the cockpit. But there were two on the right-hand side and one on the left-hand side. Funny, they have even included the decals with plates describing the positions of these levers (e.g Advance-Retard) but not the levers. Just check the photos of the TVAL replica cockpit in the instruction book.
Pity, you are not coming to ModelExpo in Melbourne. Would be great to meet you ther with your Gotha...