Hi Fred
I may have worded that confusingly.
When I pulled the starter the front face of the ring gear looked shiney and a tiny bit knarled.
I measured how far back the front face of the ring gear was from the starter mounting face and this was @ 3/4".
I them measured how far the starter teeth were sticking out beyond the mounting face at rest and got the same dimension.
So I realised the starter was running against the ring gear.
By fitting the spacer I have given a 2mm gap between the gears at rest.
But I have also ensured in doing this that when the starter gear is thrown into mesh that there is enough travel to give a full penetration into the ring gear.
I am suprised you have found out that the manual calls for a common starter as my dabbling on the VMF suggested that there were two different snouts for manual and auto.
There is lots of talk about spacers on there too so I cant claim an original idea on that one. Thanks Mark