[Collins] 75A-2 main tuning shaft needed and question

[Christopher J Galbraith]

Hi gang,

I am trying to fix a 75A-2 that was damaged in shipping.  Right now, I
am in need of the following part:

-main (kc) tuning shaft (the one that goes through the front panel) or
complete assembly with 10-turn stop

Also, I have a question for anyone who has disassembled this assembly
before.  Is the 10-turn stop "collar" help to the tuning shaft by a
center pin?  It seems like it, but there are also threads for set screws
in the collar, although there are no set screws present.  I figured I
should ask before hammering (!) what appears to be a center pin.

Thank you for any help in sourcing these parts, and any advice on
disassembling/reassembling this assembly.

73, Chris KA8WFC