Greetings Wayne,
MA refer to the part that goes through the Nylon block as the "Axle". It is 1/4" diameter with two holes for the push rods, yes?
The mystery spring is of great interest. Any chance of a digital photo to show how it is installed? Also, a photo of the spring removed from the unit, providing this is not creating a reassembly nightmare.
With kind regards,
Dave Wilson
PS. Did you get the MA Case Ejector adjusted and working properly?