You're both right, guys.
The problem is this is very old helo bought for a penny by a young man with limited wallet who is a total newbee in rotary flight, otherwise he'd never bought it. I met him after he purchased this gift of fortune and now I'm trying to made something to save him some hundred bucks and to probably save his butt from serious problems. I spent last two days balancing his MR which had 1.8 IPS shake - now it has 0.04. But I also told him that he shouldn't fly his thing before his TR is repaired etc. I'm just looking for new information in this new (for me) world of helos. Thus such unusual questions.
I understand about RHC, licensed engineers etc - but it's Russia and some certain lack of knowledgeable tech men.