Just a word of caution to the wise. St4's have a habit of the hoods popping open when being towed. This distroys the hood, and severly damages the front hood support area just below the windshield. After having this happen twice, I recomend that one always dilligently tie down the hood. A bungy from head light to headlight works well, I preferred a small strap. Joe Smolar used a pair of bungies in a big "V" from each head light to the bumper hooks. Also when towing any great distance on a conventional flatbed trailer it is wise to protect the windshield on lots of makes and models of snow cats. Tucker's were tall enough not to usually have a problem, but ST4's, and smaller machines like Bombi's were prone to getting their windshields knocked out. In one case having a windshield knocked out led to pressurizing the cab enough to blow off the top hatch. By the time I got to Whitehorse the machine looked like it was in the 'Bonney & Clyde' shoot-out. Both head lights, one wind shield and the 'Pop-top' were gone, as well as one rear trailer light. My brand new one ton daully also suffered a cracked winshield, and loss of one headlight. The Alcan's a killer! If your driving down the Alcan and you find a pop top and a wing window for a Snow Master, there mine!(and were a real*%#!! to replace)