{Collins} Brass 75A4 spinner knoibs..

HI to the group..Newbee here..  Want to thank everyone, particularly Heinz, for the help getting a copy of the illusive CCA Tech Sheet A97-001. 
I am in the process of restoring a 75A4 and noticed some time ago there was mention of a brass 75A4 main tuning knob and 4:1 drive assembly instructions. 

Is the fellow still making the brass knobs? How do I contact him?

Are the drive assemble instructions available? Can I get a copy? 

Is the drive assembly available anywhere? 

Gary w5uuo

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