LP 179 Cyclops Tambourine BK

I chose this tambourine out of the three LP-Versions because I think it has the smoothest, nicest Sound. I still like the sound a lot.
But after a few years of using it (not very much or exceptionally hard) the jingels started cracking. One day I found strange small metal pieces on one of my toms and it kind of scared me; was afraid they might have damaged the bearing edges had I not detected them early enough. Nothing happened but I was and still am disappointed in the short longevity of that tambourine. That is only for the jingles. The plastic part of it and the hardware show no sign of fatigue.
I replaced it with a LP-steel jingle tambourine which sounds different, a little harsher but also nice. I've seen really old specimen of these steel-jingle tambourines and hope mine will last for many years.
Maybe the problem is the dimpling of the brass-jingles which makes the sound nice but also might lessen the stability.