I've been using an old X-country ski pole for wading for a few years. I worried about the sound the metal tip was making as I wandered up or down stream. Metal clanking against rocks couldn't be good.
Got a crutch tip close to the diameter of the tip, put it in place and filled the gap with epoxy. Stood it up to distribute evenly. Been working fine for a couple years. A big loop of parachute cord on the handle goes over my head to keep from losing it. Good third leg!

Bill

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Name indicates where I fish and for what I fish.