maybe one of you guys with a 'c' model can tell me the axle to crown measurement on the correct original fork. the measurement i need is from the center of the axle to the bottom of the headset crown race. i know a 40-41 dx is 15", and the prewar frames with the curved downtube and straight middle bar (autocycle? motorbike?) are 15 1/2", but i need to fill in the blank on the 'c' model. :?: thanks!