Well, after reconstructing the broken Fairchild Channel F controller (1) using the ‘plunger’ from a donor Video Command controller, I hit another snag.  Three of the centering spring tabs on the other controller (2) are broken off.  This causes random control input as the plunger can move freely from side to side if you let go of the stick.  Since I replace the internals on controller 1 with parts from the Video Command controller, I salvaged some of needed centering springs from the original internal of controller 1.  I’ve noticed that the centering springs in the Video Command controller are of a much better design.  The system is now 100% other than some cosmetic flaws, and now has a place in the game room.