Nardi turn signal cancel ring question- '68 911

[911K]

I bought a new Nardi hub adapter for a vintage Nardi Classic wheel I recently found and have a question about installing the turn signal cancel ring.

The application for the hub adapter shows 911/912 up to 6/73 on the box, but the hole for the horn contact doesn't like up on the turn signal cancel ring. I have installed the adapter on the steering shaft and it fits perfectly, so I assume it's the correct adapter.

I could just use a Dremel to open up the hole, but I don't really want to modify the original cancel ring. Is it possible that there is more than one cancel ring & I just need to source one that fits?

Another alternative would be to get a Nardi to Momo adapter and use the Momo hub adapter I already have, but I like the looks of the Nardi adapter as it is solid instead of the collapsible type of the Momo.

Any help would be appreciated.

Mike