Greetings Rob.
We all have that problem at times. It comes with practice. After watching Marty do it for years I also wondered if it was possible, but alas, the more you make the chips the better you will get at doing it. I still have some of mine that do not come out on the first try. I am pretty sure Marty would say the same thing. I am sure he still has his moments. No worries, you will get there.
David