i put on my cz-as today (~u.s. exos) and wondered if i'd got them on backwards, the left one was softer and usually it's the other way around. i han't had them on for more than a few minutes when i heard this awful crunch. so i sat down and inspected them, cut away some of the rubber coating, couldn't see any cracks. got back on, wondering if i'd just stepped on a nut or something, did a few test bounces and my left stilt snapped in half, right across, just below the pivot arm.
i got 90 weight springs, ~10kg over my weight and am still wearing them in, i doubt i've bounced more than 2 1/2 ft. high.half thinknig someone suspicious might have f**ked them bcs last time i had them on they were fine and i was just standing around balancing for 15 minutes before i took them off and the left one was def. firmer, like normal then.
hopefully my 1 year warranty (from an ebay) co. will go thru.. posting this as a fyi in case you hear the same thing and think it was something you stepped on.