a friend of mine who is also a fellow xing yi chuan practioner use's kettelbell in his xing yi practice and it looks like its working, he gave me a punch the other day that almost knocked me on my ass, i'm thinking of doing this ass well(i'm still ahead of him in the power department but he's catching up) and i see some internal stylist are also getting in on it. so what do you guys recommend what wieght should i start with. i already practicexing yi with a weighted vest(and some times a book bag filled with wieght plates) but thats just mostly stance holding. any suggestions. thanks guys