I recall this when made in the '70s. I once purchased a layout of Lionel O72 tinplate track in 1976 from a guy in Seabrook, Tx. that was building his new one with Tru Track. I remember getting a great deal, including switches, and all mounted on two 8x4 3/4" plywood. Never heard how his new layout turned out, but I hope it was better than these posts may indicate. I have looked at the advertisements for this in my Lionel catalogs from the '70s.
Jesse TCA