I have personally see Marty's layout when he was alive and he told me when he built the layout with catenary he told me he built each catenary stand from scratch and he built the whole catenary system the way he thought Lionel would have built it in his mind . he welded all the brackets and stands from scratch and it worked flawlessly . with out any problems ! catenary was his favorite as he grew up in Philadelphia where they had catenary at the time he was growing up !
Alan