After reading all of this great info, I have to say the problem is still, Over tightening. That's also caused somewhat due to the easier tightening 0f the blade clamp with the larger knobs that are easier to over tighten. The aluminum blade clamps on my 788 are easy to strip out, so I just keep telling myself, DON'T, when I clamp a blade, especially in the top clamp. I'm reminded each time I flatten a blade top. It might be from the spin of the end button not turning enough when I tighten the thumb screw. I need to clean them & oil them more often, so it will turn easier. Well, I tired already, so will quit rattleing on. Good Luck.