Take your compression connector and disassemble it. Remove the lock nut and the small metal ring under the cap.
Insert the shank washer into the cap. Place a large o-ring over the cap threads and then screw the cap back on. Place a rubber bumper in the center of each side of the cap.
Screw the eye-screw into the end of the rod. You may want to add a decorative washer or something to the eye-screw before screwing it in.
Peel back the grip a little to give you access to the section of rod that will be under the pommel assembly. Build up the area with the black duct tape until it takes a good bit of effort to get the pommel back on. Work the pommel back on and flip the grip back over the threads and test the entire assembly for stability.