Quote Originally Posted by OakLeaf View Post
I had to look for a picture. http://www.cambridgebicycle.com/design/vintage.htm The front seatpost is pretty much normal (might have a different clamp, but that wouldn't be too difficult to find/shim as needed); the rear seatpost/sissy bar comes up from the rear triangle where rack bosses would be.
Yes, it was exactly like that yellow one on the green bike. I wish I had gotten a picture. I think it just attached at the front, and was not attached at all at the back. It looked very unstable and silly (which was probably the point). I suspect this wasn't for comfort on centuries...but maybe this is the answer so many of us have been looking for!

Now, if it only had a cutout.