Mr. Pieniezak, You grabbed the words right out of my mouth. As you point out, if you were moving containers in space, the Upside-down notion is relative. Equilateral triangle cross sections (or consistent trapezoid cross sections for that matter) (...) (19 years ago, 18-Apr-06, to lugnet.trains, FTX)
(...) The containers have to reach planet level at some point... where they are carried in the more usual manner ;) Tim (19 years ago, 18-Apr-06, to lugnet.trains, FTX)