The custom cutsheet size for the 3800 can be made 17"x 6 feet, maybe longer? so says the owner of the store Exim Vaios, online as that and another name like Bytes and something, out of Berkeley, CA. I bought the 3800 from them today because of this possibility for the panoramic image, no doubt hand fed at a length like that. Hope I use it, the panoramic idea. They have a bunch of paper choices as well.
John, I was given that link on another forum but didn't find a link about them custom cutting paper--altho' they do have 'converted' Epson paper cut from rolls and de rolled.
I hope the owner is correct but all we have been told by Epson and others is that the maximum length is 37 1/4". I have the 3800, have heard or read nothing to the contrary of this. Before I bought the 3800 I read that Inkjetart folks were told by some Epson advisers that the maximum was 37 1/4"--before you unwrap that printer, if this is paramount for you---check further. You may want to return it and buy the 4800. I would be interested where he got that information---and if he, himself, has printed that length or knows anyone that has.
More: I have gone into my driver and checked again---the max for input for length is 37.4 inches. I'd love to know how one overrrides this---I really doubt its possible.