It helps if you can hold a packet with just your thumb and be able to move your hand freely without dropping it. Try just breaking off a few cards and just hold it between the pocket of your thumb joint, and your palm as you would during a running Charlier. When you have that grip down you should then look out for finger placement for the rest of the cut.
When you start the running Charlier, hold the deck very high on the tips of your fingers. This gives you more room to move the packets later on. Drop the first packet into your palm. When you push the packet up with your index, push it right up into that thumb pocket joint. if the packet wont fit there during the cut, then you have to take a step back and look at how you are dropping the packet in the first place. Where the packet pivots into your thumb(fulcrum if you will) depends on where you initially drop the packet into your hand. If you drop it with the long edge closest to you closer to your thumb, it will have a hard time pivoting into your thumb joint, but if the edge is farther from your thumb, then the packet has more mobility and you can get it where you want.
When You have the packet held with your thumb, and the rest of the deck at your finger tips, you need to make sure there is a gap between the two packets. If there isn't a gap, then you cannot drop the next packet. Look at this tutorial for the One Handed Triangle:
One Handed Triangle Tutorial. Notice how the packet it pushed into the thumb with enough room that gap between the two packets.
After that then you just repeat this until you drop and push up the last packet.
I hope this helps! Contact me if you need more help with this, or other moves:
m.lang@LangFlourishing.com
-Matt Lang
www.LangFlourishing.com
