Where does this kamov involvement theory come anyway? Kamov birds have less similarity compare to z-10 than almost every other gunship and clearly none of their signature design end up on z-10.
Kamov did the front end engineering of Z10 meaning they did the paper machine which entail simulation, preliminary design based on PLA requirement .
But that is the only kamov involvement. They didn't actually built, test or verify the prototype Nor do they supplied the component or involve in the latter iteration of Z10
Why ? because at that time China doesn't have the software to simulate or verify the design concept. And you cannot buy or rent Heli design software. But even if you can rent the software designing Heli involve more than running software simulation.It is also based on long accumulated experience .
Now China has all those tools,experience and the next gen Heli design doesn't need Kamov anymore