Any help on this one would be great. I have a Delta 12" Planner and while changing the blades today, one bolt on each blade stripped. Not the treads but the hex hole. It's a rounded head so no with the visegrips. I tried cutting a slot and using a flat blade screwdrive and that didnt work. I remember someone saying they got sparks loosing theirs (mine too), so are they really suppose to be that tight? I don't think I put too much torque while putting in the last blades. So I know I'm not the first to stip one out. Any ideas?