Thanks Bigted much appreciate.Yes that is the correct cutting disc for that model.In fact all the VC-125's,VC-160's and VC-160 Auto Drives used that cutting disc (only small variations.The earlier ones had only two holes for blades not the four holes you see in the picture),but not all in the VC range. VC-Sports ans VC-Mustangs had a different cutting disc.
Also that Mark IV in the last picture I had to wreck it out for parts.The base was absolutely trashed and I felt it wasn't safe any more.Didn't help that someone tried to weld it,but just made it a lot worse.