Looking for info on the W5 Terraloader models. They are a pretty neat little package but I can find very little information about them. There's always a Guru around on just about any topic. Anybody here know of a go-to-guy on the W5? Some of the things I am trying to figure out is the change from industrial yellow to Flambeau Red? I see both but is the red early and the yellow late, or vice versa? And What difference was there between a W5 and a W-5A? I am most interested from the historical perspective as I have to write a short article on them. Any tips, clues or tidbits appreciated.