I don't remember where I saw it, but there is a video somewhere of someone making the gantry track out of Fastrack. I was thinking it was a Lionel youtube video, but I am not certain that it was? Memory ain't what it used to be... Maybe someone will know of it and post a link, if you are interested. Otherwise I don't see why your tubular method would not work.
Any idea when we will be able to get these gantry cranes? I have had one ordered for well over a year now, and maybe closer to two years. I think they were due last fall if I remember correctly.
