after searching for a good business card jig, (and finding ones that were either too big or too small) I decided to make this one on my own.. it has a .02 tolerance between the top and sides to ensure a tight fit without the struggles of making sure you are lined up.
Made of 2 pieces of 3mm basswood, I cut 6 business card slots with finger notches for easy release. They were measured to a .02 tolerance on all sides to ensure a solid and tight fit. No more adjusting the card left and right or up and down to get it in the center of the jig. Cut the first piece (with the cards), then cut out the base plate, and glue the two together.
Note: this was designed for the F1 Ultra, but I am sure you can use it on any..
If using the F1, spin the jig around to where the writing is touching the back of the F1 Ultra to give it the right clearance for the camera to pick up all 6 cards.