Hi, I've been hiking since August on the PCT. I've gotten most of my equipment, sheared off weight and am in pretty good shape. My question regards trekking poles, I current have MSRs which don't retract. I'm currently looking at Lekis, any suggestions as to which one? I've had 3 spine surgeries in the past 8 years, so poles are a real plus for me. Thanks for any suggestions.