Placed two cards together and taped the bottom of them to the table.
Cut a hole in the top of the device and tied string to the note cards.
Pulled the device all the way back and placed the bean on top of the pulled back card.
The bean went too far.
Cut a line through the card to place a small shelf to hold the bean in place while pulling the device backwards.
It worked after many attempts to pull the device back at the right angle (110) to get it to go the right distance.