ok i got a dumb and totaly off the wall question on classic deeres, the spoker D in 1923 has a 4 slot steering wheel on the end of the spokes of the steering wheel there are 4 round holes all other holes are slotted, in a picture of one of the 112 model C's which later became the model GP, the steering wheel is solid but these same 4 holes apear in the rim, in all the pics in the book, nothing apears to use these holes, yet there obviously desiged for something, i cant picture anybody installing a spinner handel here as to use it he would have to have arms directly related to king kong himself,so what were these holes for???