ultra move , natural ?

i like the ultra move (harry lorayne) a lot ... haven't used it much but practice it every now and then. there is one un natural issue with it which bothers me at times. if using the left thumb you push the top card to the side to display its identity to the spectators you must also pull it back with the left thumb. this happens naturally and also because the thumb is still in contact with the card and the other fingers can't reach ``easily" the side of the pushed card. in order for the fingers to push back the card the thumb has to first pull the card back a little then the fingers can complete the job.