With the kBox it is quite hard to target the pecs, but the kPulley is designed to for that reason. The kPulley allows for pushing exercises and horizontal pulling motions.

I have seen a photo of someone doing push-ups across two benches (hands on one bench, feet on the other), with a chest harness like front squat harness from Spud attached to the kBox. You might be able to do something similar with a kPulley by setting it up at your chest height and having two posts shoulder distance apart with the kPulley passing between the two posts.

@@andrewdeandrade This is quite common and it is a really tough exercise that will challenge you for sure!

I do flies. Put the angle attachment on and weigh down that side of the box. Hinge at the waist and pull across your body. I usually super set with push ups.