[ca1ore]

Fair enough. It would actually be interesting if folks would publish their numbers as you have done. In my case, I've owned 14 vortech pumps - 6 old style MP40 (only have one left), 3 new style QD MP40, 2 MP60 and 3 MP10. I inspect and clean the wetsides every other month. I dropped one of the old MP40, oops, and sold off four. None had split or rusted magnets. I replaced the remaining old style MP40 wetside last year after 5 years of use, no split but it had developed an unfixable wobble. Two MP60s are three years old and on their original wetsides, no splits. One MP10 got water in the dryside so kaput; other two are QD models and no splits. Maybe I'm just lucky.