My first attempt at lacing was on this '60s Schwinn Sprint saddle (I believe was made by Ideale but I'm not 100% certain). The sides were completely flared out until it was nearly flat, and the tension adjuster had never been tightened.
I thought about soaking it in water and trying to re-shape it back into a near original profile using rubber bands and straps, but was worried about long term affects of the water.
The challenge I encountered when planning the lacing, was avoiding the clamp and seatpost. Since this is used on a pre-war era Schwinn, the post is the tiny 13/16" variety, and the separate Ideale clamp is rather bulky. Because of this, I decided to lace two sections, one towards the nose and one more to the center rear section. I should have been more careful with my spacing.
The lacing has returned the saddle to a nice shape. I've not ridden it yet as I've been waiting on the new wheels (which I had built) to arrive.
The entire bike looks like this, if you're curious. Now that the snow is here, it might not be ridden until April or May.