Has anyone used the Rockler sure foot aluminum bar clamps? How do they compare with Bessey clamps? Do the clamp heads stay parallel to each other and 90 degrees to the clamp rail? How powerful are they? For example, I'm making a 36" wide butcher block type table top with 17 2" pieces. Do they have enought power to handle somethng like that? I know that in general, you get what you pay for, but I've had some good luck with other Rockler products and just wondered how good these clamps are.
Thanks for any feedback, Carol