I think when learning new shit you should let the ball bounce without doing tb so you get the feel of the spinning without worrying if your going to get the tb or not. Once you got the spinning right (without doing htw at the end) go back to the tb and when you get that right you know what to do right away.
Once you learnt them together learn the htw, again... throw the ball all in the air and try to do htw from that so your not worrying about the rest of the trick.
Hoped that helped :thumbsup: