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@Scilly.Suffolk
11 speed rings have short teeth and ramps & pins to aid shifting. In the context of a 1x11 set-up, "shifting" translates as "losing the chain".
You need a narrow-wide or single speed specific ring, which will have full height teeth and lack ramps & pins.
A quick Duckle suggests that these aren't available in 135mm BCD. Although Campag compact cranks use the common BCD, the bolt on the crank is offset: see the comment from HelicopterHelicopter above.
11 speed cassettes have the same sprocket spacing but the freehub patterns are still specific, so your wheels will determine what you can use.
Chains are chains: as long as it's 11 speed, it'll work.