If you want to give this a try, get the book "woodturning Wizardry" and study it. I have a buddy who makes stuff like this and he says it's easy and repetitious. you can make your own Chinese ball tools or you can buy a nice set from Craft supply.
http://www.woodturnerscatalog.com/cgi-bin/shopper?search=action&keywords=wizardry
I've seen my buddy make the stuff and it is all in the fixturing. Fix it to the lathe correctly and you will have no catches and it will come easily in time.