I have a 2 year old 6'X12' single axle,open trailer with sides and gate. I am buying anotherr walkbehind so I now need a bigger trailer. Ive been looking a 14' double axle trailers and they are pretty high$. I am a pretty good welder and fabricator and got to thinking I could probably extend my 12' to 14' and add an axle without too much hassle or cost. Anyone ever done this. I figure as long as the main frame rails are strong it shouldnt be a problem. Thanks.