Sorry, haven’t got enough time to do this yet cuz I had problems with using models (they are not in t-pose and there is strange error because of it) and now i have to face some another tasks to do, so i will probably back to that problems in 4-5 weeks 
But thanks to your help, there may be another approach (Havent tested it yet) to that problem u can export animations in 3dsmax and then load them to different skeletons but u must define how to retarget them first.