I've been restoring my dad's '30 model A, which has been in pieces for 35+ years. I had no problems restoring and rebuilding anything until i came to the horn. I believe the horn that we have is a GMI model as the brushes are mounted perpendicular to the frame. Ive looked in all my restorer books, service guides,restorers club magazines and scowered the internet and I have yet to find anything that takes about how the horn is assembled. I have a general idea but I still havent figured out how to keep the brushes in place on this particular horn, or how to connect the wires to them. ANy help would be appreciated.