I was a Magic Demonstrator for years and I sold these thing like hot cakes as it were. If you have a problem with the coin dropping out to soon or just want to have it held secure at all times you can hold the tube with the middle finger at the top (R) side (if holding with right hand) and with the thumb at the lower left side and "squeezing/pinching" slightly. This will cause the pieces to push sideways just a bit and will also create a downward pressure holding the coin in place securely so you move with confidence. Also I have found this plays very well if you have the coins pass thru on the palm of your spectator's hand. They will not feel the first coin when you set the stack down, just set it down but not too gently. After that all will be well. It will be even more amazing. I hope this helps. I also hope someone reads this.