Alright, thanks for everything :)

I'm not sure about that behaviour. I'm unable to test it right now, so I suggest you take it to the Arma 3 forums or Discord.

Set up all my personal settings and it's the same.
http://i.imgur.com/RG7f9Ia.jpg
There are missing icons for RPM and few others on a green line and place with right color dosn't work properly because no matter how much power is on the engine on this gauge, helicopter still behave like on casual mode (when you don't press Q or Z to ascend or descend, your helicopter will just hover)

That's correct.

Just to make sure - is it correct?
http://i.imgur.com/zmQI5qj.jpg

It might go after the host's AFM settings when it's forced, so go through your difficulty settings.

I think that's the only setting. 0 to disable and 1 to force. I don't think there's a way to force individual AFM settings.

forceRotorLibSimulation - made that gauges showed up and flight model maybe is a little bit harder but it still feels casual. Is there something more that can be done to make flying harder?

Thanks. You can force it in the server settings (server.cfg) with forceRotorLibSimulation. If you're hosting locally, you can unpack this scenario and add it to description.ext instead. We don't like to force it because it causes lag for some players.

Your scenarious are great! Could you make same scenario as this one but with forced advanced fly model? That would be perfect. Thanks for your effort!