Well.... we don't have strings in most helicopters, but 'ball' in all..
not quite true, it is only recently we over here to have balls installed, just think what sort of 'real' results we could have done with them. I never knew the install instructions. Ship level on the rigging jacks or in the hover skids hanging low differently for every type, it's a quandary. Remember one day with a high order F/W department person on board; 'Have a go' I says to Barry, next minute I'm nearly a block of ice in the wind draft. Ol' mate is fighting the ball which is only attached one end, but there cos it's the CP's machine and you all know about the blessed rules eh. I cover the ball and tell him fly what the reckons is right, give it a flick with my thumb and praise his accurate flying once I uncover it as now right in the middle.
As I get older yeah it's hard to work out when I lift off, now do I go faster forward to get there or slower backwards with this earth spinning thing.
I was taught without strings or ball, fly for fastest airspeed at the given power setting, that's when it is in best trim and balance.Try it, you may be surprised how comfortable it feels.That is regardless of what you are doing at the time, turning, climbing or cruising.