@royal Ross Smash? I was skiing Hexcel Sundance with LOOK N57 a few days ago. I kept cranking the toe up but was still twisting out a little too easily so I did not get a really good feel for the ski but they were light as a feather, soft but snappy. I think I read somewhere, here maybe, that there were 2 springs available? Well, I took them apart again and another pair and found 2 different springs. Have you found that? I don't have any way to accurately measure but it seems the diameter of the blue coil is maybe a 1 mm bigger than the other and the gauge of the coil seems to be a little thicker.
I don't have any N57 to compare but you might be able to swap in springs from the N77. or from one of the later plastic bindings. looks like I need to send you some calipers with the next shipment.