When I take my packages to the post office the lady has to move her scale and stack things underneath it to make room for the 72" packages I ship. Couldn’t she just weigh one end of the package and double it. Or weigh each end separately and add the two weights together? My packages are always balanced in the center so no need to weigh each end.
I can see where it might make some difference on how the package sits on the scale so if the platform is say 6" square should the opposite end be held 3" from the end?? When I do this at home it always comes out right on.