Elgin Bluebird photos

[Kickstand3]

My only concern with having the seat post extended so far aft, is that your putting a huge lateral load on that unsupported section of the seat tube that extends above the top tube/seat stay joint.
Maybe nothing to worry about, but just something that makes me cringe, from an engineering standpoint.
The 36 Robin frame, has always kept me up at nights, for the same reason. Lol!

It’s pretty long goes just about where the seat tube starts curving