I bought the kapex last july and hadn't put it through the paces till the past two weeks on a sizable trim job in berkeley, CA.  I did use previously on a flooring job at my own house but that was pretty much all 90 degree cuts.  of course reading all the posts about scraping i was concerned.  i would move it on the miter scale back and forth ten time or so every now and then and no problem but after 9 days of all day trim cutting it happened, scraping like my ribs were being scraped with a kitchen knife.  called festool junkie whom in turn referred me to lester and he promptly sent the replacement kit which arrived today, will report back on the findings of the replacement, seems to be successful for others so i am hopeful.