No I got You Jonesy. The model 3 and Model 4( NON AUTO) would be the same as they Intersected and ran side by side,So it makes perfect sense. Yep that is right they have 8 locating tabs. The first example has 8 as well with 4 Mount Brackets. (Next Post)
And yes I often doubt the diagrams,which I have brought up with Unkie on a few occasions. Look at all your first diagrams. The model 3 STD is running the 2a pulley,which is accurate for early model 3s. BUT then the Specials also have the same pulley in their diagram. The Auto and Specials did not recieve this Pulley. Its not really a misprint as such,Just reusing OLD artwork. Very common for Victa Images. Hence the Confusion.
These all look on the money Jonesy from the Variants ive seen. Its good to finally see which ring went with which Model. Youve done well to distinguish them correctly.