Slides are a great way to build confidence in your hands. They also afford you a smooth way to prepare for an opening in a different grip.
1. Start in the basic forward grip, closed position.
2. Slide your thumb and middle finger toward the butt slightly to provide the clearance need.
Bending your middle finger in will make the motion a bit easier.
3. Now let the Balisong slide around by straightening the middle finger and thumb. Straightening the two mentioned fingers will also help to add clearance. Use gravity to help the slide if necessary.
Continuous circles in both directions is what you’re working toward. The longer you can go on, the better.