I have a 2004 Haulmark Lite enclosed trailer. It currently has a single axle. I was thinking of adding a second axle so I contacted Haulmark to see if they had a kit for this. Their response was that the trailer was designed for a single axle and that is all they recommend. I have had flat tires and thought adding a second axle may help or at least give time to pull off highway when traveling. Any thoughts or suggestions would be appreciated.