Drill a hole in the center of one of the caps and attach a rubber bumper. This goes on the bottom end of the staff. It will help keeping the staff from slipping when crossing creeks and rocks. The soft rubber will not scratch rocks like the carbide tips do on the commercial staffs. This area has lots of room for experimentation. The caps are cheap and you can make interchangeable tips for the terrain. You can make one with a pointed bolt for ice or rocks.