ok, so in the 1st photo of the complete seat, the bottom is an original, the top is new and supposedly correct. when the top is placed where i thought it should be, visible leather strips to hang on in the second photo, then the bottom attachment strip is not even on the bottom board, see the strip near the orange screwdriver handle, lower left. also note that in this position the two cushions are already touching, so to go lower means forcing it. now in the second photo, the leather strap seems to be all there, i can see the bottom is worn and curled where the springs must have hung, and there are no signs of how it was attached on the bottom. no screw or nail holes on either of the two original wooden backs i have. also, on the two backs one has tack holes all across the top edge, while the other has none there, but instead was tacked on the back side all the way across. so questions are, location of the springs, and which tack method is correct? thanks, skip