Hi, was just wondering if you know what the defect is,as I have DW788 Type 2 2010 and have been trying different suggestions found on other sites,for blade travel front to back, moving bottom assembly,moving top,adjusting tension,have now replaced top arm and wedge,hoping wedge was the problem,saw is about 1 year old,but now that I have messed with it,i'm probably on my own to get it fixed......have not contacted Dewalt yet.