Marpo rope training, mounted to whatever you already own.
The X8 is the smallest unit in the Marpo lineup — a 45 lb head that bolts onto a group training cage, a power rack, or a structural concrete wall. Once it's up, you have the same Dynamic Magnetic Brake System and the same bidirectional rope pull as the big VMX, in a 21×11×7″ footprint.
The auxiliary pulleys let you change rope orientation between vertical, diagonal and horizontal pulls. Cluster two or four units on a single rig and you have a group-training rope wall.