This is a simple and sturdy design. This is a common design used throughout the country. I designed it to use a 3500lb axle with 205/75-R15 Tires. I use mine at least once a week for something. With a little skill you can build this yourself and save hundreds of dollars. I will mail you hard copies on 8 1/2 X 11 paper. All plans are designed by Ben Stone. Ben is a retired Engineer in Canada. Ben also drafts these himself using the latest AutoCAD software to ensure accuracy. He studied Engineering back in the early 1980's. After over 30 years in the Construction industry he developed a passion for building cool items around his farm and cabin. These are great DIY projects. With a little skill anybody can Do It Yourself. Ben is always a email away if you have any questions while building one of his projects. He is adding new plans all the time.