Novarossi +4 question in an mp9 TKI2

[The Chef]

I'm about to make my first venture into nitro racing and would like some advice please.

The MP9 supplies a chonicle collet for the crank shaft but the +4 appears to be supplied with one attached already that appears to fit the kyosho clutch bell perfectly could anyone clarify this please?

And once the clutch assembly is installed the instructions state to run th 20mm O/D shimm but the crank shaft O/D is bigger than the shimm I/D.

Advice please as I don't want the maiden voyage to be fatal or wreck anything mechanically that is down to incorrect assembly.

Thank you.