I can assure you the rigger LLD is talking about is very experienced in both tower building and helicopter work. I have spent over 150 hrs building towers with him.
The only way you would get him rattled is if he does not know you well enough.
In saying that, I have never attempted to do any kind of lifting in a 204 nor will I in the future.
I think newfieboy hit the nail on the head. Practise makes perfect.....or atleast close to perfect.
Cheers
TMY