the first one appears to set by tightening the screw, I have a varient of that idea, in each leg, have the screw go through a slot that runs the length of the tool rather than accross the width, and have these two slots be slightly angled to the length of the tool so that as the screw moves along the two slots, it spreads the ends, because the two slots are angled opposite, therefore the screw would only tighten to hold its place, not to resist any force that might fold the tool together. and I would not even make this of two pieces of metal attached at the pivot by a screw, but just one piece of metal folded to a loopy hairpin curve. Yeah, I think your onto something, but It just gives me ideas on how to clean up the design. About not using a pivot screw, the amount of varience between the wide open and the closed tips that is actually necessary for a tensor is not more than a few milimeters, and the folded loop would be able to flex that much, depending on how long the whole tool is and the radius of the foldover loop. Yer just giving me new ideas.
